Pensions and other post-retirement benefits (Tables)
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12 Months Ended |
Mar. 31, 2026 |
| Employee Benefits [Abstract] |
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| Disclosure of actuarial assumptions |
The Company has applied the following financial assumptions in assessing DB liabilities: | | | | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | Discount rate – past service | | | | | | | | | | | | Discount rate – future service | | | | | | | | | | | | Rate of increase in RPI – past service | | | | | | | | | | | | Rate of increase in RPI – future service | | | | | | | | | | | | | | | | | | | | | | | | Initial healthcare cost trend rate | | | | | | | | | | | | Ultimate healthcare cost trend rate | | | | | | | | | | | |
The table below sets out the projected life expectancies adopted for the UK and US pension arrangements: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Assumed life expectation for a retiree aged 65 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
The table below summarises the split of DB obligations by status for each category of plan: | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| Disclosure of amounts recognised in the statement of financial position |
Amounts recognised in the consolidated statement of financial position The geographical split of pensions and other post-retirement benefits is as shown below: | | | | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | Present value of funded obligations | | | | | | | | | | | | Fair value of plan assets | | | | | | | | | | | | | | | | | | | | | | | | Present value of unfunded obligations | | | | | | | | | | | | Other post-employment liabilities | | | | | | | | | | | | | | | | | | | | | | | | Restrictions on asset recognised | | | | | | | | | | | | Net defined benefit asset | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| Disclosure of amounts recognised in the income statement and statement of other comprehensive income |
Amounts recognised in the income statement and statement of other comprehensive income The expense or income arising from all Group retirement benefit arrangements recognised in the Group income statements is shown below: | | | | | | | | | | | | Included within operating costs | | | | | | | | Included within payroll costs | | | | Defined benefit plan costs: | | | | | | | | Past service cost – augmentations and redundancies | | | | | | | | | | | | Included within finance income and costs | | | | Net interest income adjusted for change to irrecoverable surplus | | | | Total expense included in income statement | | | | | | | | | | | | Remeasurement gains/(losses) of pension assets and post-retirement benefit obligations | | | | Adjustments for restrictions on the defined benefit asset | | | | Total gain/(loss) included in the statement of other comprehensive income | | | |
1.Of the current service cost, £33 million (2025: £34 million; 2024: £35 million) has been capitalised to property, plant and equipment. 25. Pensions and other post-retirement benefits cont. Amounts recognised in the income statement and statement of other comprehensive income cont. The geographical split of pensions and other post-retirement benefits is shown below: | | | | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | Included within operating costs | | | | | | | | | | | | | | | | | | | | | | | | Included within payroll costs | | | | | | | | | | | | Defined benefit plan costs: | | | | | | | | | | | | | | | | | | | | | | | | Past service cost – augmentations and redundancies | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Included within finance income and costs | | | | | | | | | | | | Net interest income adjusted for change to irrecoverable surplus | | | | | | | | | | | | Total (income)/expense included in income statement | | | | | | | | | | | | | | | | | | | | | | | | Remeasurement (losses)/gains of pension assets and post-retirement benefit obligations | | | | | | | | | | | | Adjustments for restrictions on the defined benefit asset | | | | | | | | | | | | Total (loss)/gain included in the statement of other comprehensive income | | | | | | | | | | | |
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| Schedule of reconciliation of the net defined benefit asset (liability) |
Reconciliation of the net defined benefit asset | | | | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | | | Opening net defined benefit asset | | | | | | | | | | | | Income/(cost) recognised in the income statement before adjustment for irrecoverable surplus | | | | | | | | | | | | Remeasurement and foreign exchange effects recognised in the statement of other comprehensive income | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Restrictions on the defined benefit asset | | | | | | | | | | | | Closing net defined benefit asset | | | | | | | | | | | |
1.In addition to the regular employer contributions that are described above, the Company made a one-off contribution of £133 million to the OPEB schemes in the prior year. 25. Pensions and other post-retirement benefits cont. Changes in the present value of defined benefit obligations (including unfunded obligations) The table below shows the movement in defined benefit obligations across our DB plans over the year. | | | | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | | | Opening defined benefit obligations | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Actuarial (losses)/gains – experience | | | | | | | | | | | | Actuarial gains/(losses) – demographic assumptions | | | | | | | | | | | | Actuarial gains/(losses) – financial assumptions | | | | | | | | | | | | Past service cost – augmentations and redundancies | | | | | | | | | | | | Liabilities extinguished on settlements | | | | | | | | | | | | Medicare subsidy received | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Closing defined benefit obligations | | | | | | | | | | | |
Changes in the value of plan assets The table below shows the movement in pension assets across our DB plans over the year. | | | | | | | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | | | Opening fair value of plan assets | | | | | | | | | | | | | | | | | | | | | | | | Return on plan assets (less than)/in excess of interest1 | | | | | | | | | | | | | | | | | | | | | | | | Assets distributed on settlements | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Closing fair value of plan assets | | | | | | | | | | | | Actual return on plan assets | | | | | | | | | | | | Expected contributions to plans in the following year | | | | | | | | | | | |
1.For the year ended 31 March 2026 this included actuarial losses of £60 million resulting from the purchase of a bulk annuity policy with Rothesay.
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| Disclosure of asset allocations |
The allocation of assets by asset class is set out below. Within these asset allocations there is significant diversification across regions, asset managers, currencies and bond categories. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Government securities and liability-driven investments | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash and cash equivalents | | | | | | | | | | | | Other (including net current assets and liabilities) | | | | | | | | | | | | | | | | | | | | | | | |
1.The allocation in property includes £284 million (2025: £294 million, 2024: £288 million) of investments in forestry funds. 2.The fair value of plan assets set out above includes employer-related investment exposure of £nil (2025: £nil, 2024: £44 million). The investment strategies for some of the DB plans use repurchase agreements to increase market exposure of their liability-driven investments, with the fair value of these instruments totalling approximately £2.5 billion at 31 March 2026 (2025: £2.9 billion, 2024: £2.7 billion). | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash and cash equivalents | | | | | | | | | | | | Other (including net current assets and liabilities) | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | US other post-retirement benefits | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Other (including insurance contracts) | | | | | | | | | | | | | | | | | | | | | | | |
The approximate investment allocations for our plans at 31 March 2026 are as follows: | | | | | | | US other post- retirement benefits | | | | | | | | | Liability-matching assets | | | |
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| Disclosure of most significant risks associated with DB plans |
The most significant risks associated with the DB plans are as follows: | | | Description and mitigation | | The plans invest in a variety of asset classes, with actual returns likely to differ from the underlying discount rate adopted, impacting on the funding position of the plan through the net balance sheet asset or liability. Each plan seeks to balance the level of investment return required with the risk that it can afford to take, to design the most appropriate investment portfolio. | | Liabilities will fluctuate as yields change. Volatility of the net balance sheet asset or liability is controlled through liability-matching strategies. The investment strategies allow for the use of synthetic as well as physical assets to be used for hedging. | | Changes in inflation will affect current and future pensions but are partially mitigated through investing in inflation-matching assets and hedging instruments as well as bulk annuity policies. The investment strategies allow for the use of synthetic as well as physical assets to be used for hedging. | | Improvements in life expectancy will lead to pension payments being paid for longer than expected and benefits ultimately being more expensive. This risk has been partly mitigated by the investment in bulk annuity policies for NGEG of ESPS and NGUKPS. | | This is managed by having a diverse range of counterparties and through having a strong collateralisation process. Measurement and management of counterparty risk is delegated to the relevant investment managers. For our bulk annuity policies, various termination provisions were included in the contracts, managing our exposure to counterparty risk. The insurers’ operational performance and financial strength are monitored on a regular basis. | | Debt investments are predominantly made in regulated markets in assets considered to be of investment grade. Where investments are made either in non-investment grade assets or outside of regulated markets, investment levels are kept to prudent levels and subject to agreed ranges, to control the risk. | | The pension plans hold sufficient cash to meet benefit requirements, with other investments being held in liquid or realisable assets to meet unexpected cash flow requirements. These could include collateral calls relating to the plans’ liability-matching assets which could result from extreme market movements. Should the plans not have sufficient liquidity to meet cash flow requirements, they could be forced to take sub- optimal investment decisions such as selling assets at a reduced price. The plans generally do not borrow money, or act as guarantor, to provide liquidity to other parties. | | Fluctuations in the value of foreign denominated assets due to exposure to currency exchange rates are managed through currency hedging overlay and currency hedging carried out by some of the investment managers. |
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