v3.26.1
DEBT SECURITIES IN ISSUE
 6 Months Ended
Jun. 30, 2026
Debt Securities In Issue [Abstract]  
DEBT SECURITIES IN ISSUE 20. DEBT SECURITIES IN ISSUE
30 June 2026
31 December 2025
£m
£m
Medium-term notes
2,220
2,290
Downstreamed from Santander UK Group Holdings plc to Santander UK plc
10,498
9,606
Euro €35bn Global Covered Bond Programme
18,073
19,201
£10bn Global Covered Bond Programme 
3,713
–
US $20bn Commercial Paper Programmes
2,264
2,411
Certificates of deposit
2,511
1,607
Credit linked notes
705
635
Securitisation programmes
7,271
5,638
47,255
41,388
Debt securities in issue increased mainly due to the acquisition of TSB, as set out in Note 29.