Exhibit 18

British American Tobacco p.l.c.

18 July 2025

TRANSACTION IN OWN SHARES

British American Tobacco p.l.c. (the "Company") announces that in accordance with the authority granted by shareholders at the Company's Annual General Meeting on 16 April 2025 it purchased the following number of its ordinary shares of 25 pence each ("shares") from UBS AG London Branch (“UBS”) as part of its buyback programme announced on 18 March 2024:

Date of purchase:	17 July 2025
Number of ordinary shares of 25 pence each purchased:	162,833
Highest price paid per share (pence):	3,900.00
Lowest price paid per share (pence):	3,814.00
Volume weighted average price paid per share (pence):	3,851.9411

The Company intends to cancel the purchased shares.

Following the purchase and cancellation of these shares, the Company will have 2,193,903,998 ordinary shares in issue (excluding treasury shares) which carry voting rights and will hold 133,005,360 ordinary shares in treasury. This information may be used by shareholders to determine whether they are required to notify their interest, or a change to their interest, in the Company under the FCA's Disclosure Guidance and Transparency Rules.

In accordance with Article 5(1)(b) of the Market Abuse Regulation (EU) No 596/2014 as it applies in the UK, a schedule of individual trades carried out by UBS on 17 July 2025 is set out below.

Enquiries:

Investor Relations

Victoria Buxton | IR_team@bat.com

Schedule of purchases - aggregate information

Issuer name	ISIN Code	Transaction date	Daily total volume (in number of shares)	Daily weighted average price of shares acquired	Platform
British American Tobacco p.l.c.	GB0002875804	17/07/2025	72,120	3,855.2774	LSE
British American Tobacco p.l.c.	GB0002875804	17/07/2025	10,400	3,856.8703	CHIX
British American Tobacco p.l.c.	GB0002875804	17/07/2025	80,313	3,848.3069	BATE

Schedule of purchases - individual transactions

Number of shares purchased	Transaction price (per share)	Market	Time of transaction
863	3,864.00	LSE	08:00:10
224	3,864.00	LSE	08:00:10
1112	3,843.00	BATE	08:01:24
1148	3,839.00	BATE	08:06:58
863	3,838.00	BATE	08:12:35
917	3,848.00	LSE	08:16:30
834	3,847.00	CHIX	08:16:32
681	3,852.00	LSE	08:19:00
27	3,852.00	LSE	08:19:00
1129	3,849.00	BATE	08:21:50
436	3,848.00	BATE	08:25:29
445	3,848.00	BATE	08:25:29
411	3,843.00	BATE	08:30:21
1006	3,853.00	LSE	08:35:43
154	3,852.00	LSE	08:36:00
298	3,852.00	LSE	08:36:00
422	3,852.00	LSE	08:36:00
405	3,850.00	LSE	08:36:30
970	3,850.00	BATE	08:36:40
344	3,850.00	LSE	08:42:30
280	3,854.00	CHIX	08:45:21
1143	3,853.00	BATE	08:55:56
1055	3,857.00	LSE	08:59:26
1034	3,853.00	BATE	09:10:34
100	3,854.00	CHIX	09:17:10
772	3,854.00	BATE	09:17:10
764	3,854.00	CHIX	09:17:10
879	3,854.00	LSE	09:27:18
226	3,854.00	LSE	09:27:18
1132	3,854.00	BATE	09:34:36
719	3,855.00	LSE	09:38:00
446	3,851.00	BATE	09:55:34
406	3,851.00	BATE	09:55:34
942	3,851.00	BATE	09:55:34
1087	3,850.00	LSE	09:57:07
994	3,851.00	BATE	10:12:07
934	3,855.00	BATE	10:30:46
399	3,855.00	BATE	10:30:46
968	3,855.00	LSE	10:30:46
878	3,855.00	CHIX	10:30:46
779	3,855.00	BATE	10:30:56
99	3,855.00	BATE	10:30:56
401	3,860.00	LSE	10:41:28
309	3,859.00	CHIX	10:46:11

958	3,860.00	LSE	10:49:17
376	3,860.00	LSE	10:49:17
1018	3,860.00	BATE	10:49:17
368	3,859.00	LSE	10:54:50
784	3,860.00	LSE	11:04:47
1015	3,863.00	BATE	11:10:12
897	3,861.00	LSE	11:27:07
35	3,860.00	BATE	11:28:37
1020	3,860.00	BATE	11:28:40
378	3,860.00	BATE	11:28:40
130	3,860.00	BATE	11:28:40
939	3,863.00	CHIX	11:43:27
758	3,863.00	BATE	11:43:27
432	3,860.00	BATE	11:45:54
664	3,859.00	BATE	11:54:30
372	3,859.00	BATE	11:56:02
903	3,860.00	LSE	12:00:41
1019	3,864.00	BATE	12:12:36
927	3,864.00	LSE	12:26:54
366	3,861.00	BATE	12:30:31
33	3,861.00	BATE	12:30:31
96	3,861.00	BATE	12:35:13
1026	3,861.00	BATE	12:35:13
1133	3,857.00	BATE	12:58:04
884	3,857.00	CHIX	12:58:04
1057	3,857.00	LSE	12:58:04
762	3,857.00	BATE	12:58:04
803	3,856.00	LSE	12:59:49
453	3,855.00	LSE	13:01:02
448	3,857.00	LSE	13:03:28
454	3,857.00	BATE	13:03:28
290	3,858.00	CHIX	13:11:43
1139	3,858.00	BATE	13:15:10
1074	3,858.00	LSE	13:15:10
404	3,855.00	BATE	13:20:01
417	3,850.00	LSE	13:30:41
426	3,850.00	LSE	13:30:41
379	3,855.00	LSE	13:34:03
996	3,855.00	BATE	13:34:03
1097	3,855.00	LSE	13:34:03
38	3,852.00	BATE	13:45:26
443	3,852.00	BATE	13:45:26
2	3,852.00	BATE	13:45:48
893	3,854.00	LSE	13:49:34
334	3,854.00	BATE	13:49:34
501	3,854.00	BATE	13:49:34
450	3,852.00	BATE	13:49:46
45	3,852.00	BATE	13:49:46

29	3,852.00	LSE	13:52:49
416	3,852.00	LSE	13:53:08
413	3,852.00	LSE	13:53:08
101	3,852.00	CHIX	13:55:56
722	3,852.00	CHIX	13:55:56
967	3,852.00	LSE	13:58:33
164	3,853.00	BATE	14:09:27
141	3,853.00	BATE	14:09:27
404	3,855.00	BATE	14:11:32
1005	3,855.00	BATE	14:11:32
1102	3,857.00	LSE	14:15:17
1062	3,856.00	BATE	14:16:05
442	3,856.00	LSE	14:16:58
451	3,856.00	LSE	14:16:58
441	3,856.00	BATE	14:20:23
445	3,855.00	BATE	14:26:51
1141	3,855.00	BATE	14:26:51
314	3,858.00	BATE	14:30:02
469	3,858.00	CHIX	14:30:02
140	3,858.00	CHIX	14:30:02
20	3,858.00	BATE	14:30:02
185	3,858.00	BATE	14:30:02
252	3,858.00	CHIX	14:30:02
327	3,858.00	BATE	14:30:02
219	3,858.00	BATE	14:30:02
90	3,858.00	BATE	14:30:02
200	3,858.00	BATE	14:30:02
150	3,858.00	BATE	14:30:02
350	3,858.00	CHIX	14:30:02
920	3,858.00	LSE	14:30:02
785	3,865.00	LSE	14:31:21
29	3,865.00	LSE	14:31:21
322	3,865.00	LSE	14:31:21
1056	3,865.00	LSE	14:31:21
888	3,864.00	LSE	14:31:26
1108	3,860.00	BATE	14:32:51
942	3,860.00	LSE	14:33:46
489	3,860.00	BATE	14:36:12
445	3,860.00	BATE	14:36:12
922	3,858.00	LSE	14:38:40
428	3,856.00	LSE	14:39:49
391	3,861.00	LSE	14:42:09
1162	3,861.00	BATE	14:42:09
705	3,860.00	LSE	14:42:32
370	3,860.00	LSE	14:42:32
873	3,859.00	BATE	14:44:13
758	3,859.00	LSE	14:44:13
412	3,860.00	BATE	14:45:54

895	3,859.00	CHIX	14:45:58
457	3,858.00	BATE	14:46:06
355	3,858.00	BATE	14:47:07
876	3,858.00	BATE	14:47:07
101	3,858.00	BATE	14:47:07
11	3,858.00	BATE	14:47:07
988	3,861.00	LSE	14:50:04
627	3,864.00	LSE	14:53:09
369	3,864.00	LSE	14:53:09
441	3,864.00	LSE	14:53:09
1160	3,864.00	BATE	14:53:09
141	3,870.00	BATE	14:59:45
117	3,869.00	LSE	15:00:01
451	3,870.00	LSE	15:00:01
376	3,870.00	LSE	15:00:01
756	3,870.00	LSE	15:00:01
517	3,870.00	LSE	15:00:01
402	3,870.00	LSE	15:00:01
280	3,870.00	CHIX	15:00:01
909	3,870.00	BATE	15:00:01
909	3,871.00	LSE	15:01:12
895	3,876.00	LSE	15:04:08
995	3,876.00	BATE	15:04:08
854	3,877.00	BATE	15:07:16
913	3,877.00	CHIX	15:07:16
1061	3,893.00	LSE	15:12:41
568	3,900.00	LSE	15:13:00
916	3,899.00	LSE	15:13:02
140	3,899.00	LSE	15:13:02
732	3,899.00	LSE	15:13:02
780	3,895.00	LSE	15:13:17
959	3,888.00	BATE	15:16:08
577	3,888.00	LSE	15:16:08
1032	3,887.00	LSE	15:17:28
798	3,887.00	LSE	15:18:30
740	3,886.00	BATE	15:18:33
238	3,883.00	CHIX	15:18:43
754	3,880.00	LSE	15:19:22
733	3,875.00	BATE	15:23:26
892	3,875.00	BATE	15:23:26
722	3,875.00	LSE	15:23:26
814	3,873.00	LSE	15:25:24
321	3,873.00	LSE	15:28:05
773	3,873.00	LSE	15:28:05
32	3,873.00	BATE	15:28:06
157	3,873.00	BATE	15:28:27
758	3,873.00	BATE	15:28:27
383	3,870.00	BATE	15:28:44

291	3,870.00	BATE	15:29:28
605	3,862.00	LSE	15:31:13
1	3,860.00	LSE	15:31:30
818	3,860.00	LSE	15:32:43
252	3,859.00	LSE	15:33:13
225	3,859.00	LSE	15:33:13
236	3,859.00	LSE	15:33:13
785	3,853.00	LSE	15:35:11
417	3,850.00	BATE	15:37:26
422	3,850.00	BATE	15:37:27
1036	3,850.00	BATE	15:37:27
775	3,846.00	LSE	15:39:38
700	3,845.00	BATE	15:39:46
138	3,845.00	BATE	15:39:46
623	3,844.00	BATE	15:42:01
375	3,844.00	BATE	15:42:01
214	3,844.00	CHIX	15:42:01
502	3,844.00	BATE	15:42:01
436	3,839.00	BATE	15:42:43
430	3,840.00	BATE	15:42:43
482	3,840.00	BATE	15:42:43
442	3,840.00	BATE	15:42:43
406	3,840.00	BATE	15:42:43
484	3,840.00	BATE	15:42:43
421	3,840.00	BATE	15:42:43
207	3,841.00	LSE	15:44:22
748	3,841.00	LSE	15:45:05
742	3,841.00	BATE	15:45:05
603	3,841.00	BATE	15:45:05
121	3,841.00	BATE	15:45:05
561	3,841.00	LSE	15:45:05
206	3,841.00	LSE	15:45:05
843	3,841.00	LSE	15:45:05
323	3,830.00	LSE	15:46:42
333	3,830.00	LSE	15:46:42
354	3,830.00	LSE	15:46:42
334	3,830.00	LSE	15:46:42
996	3,835.00	BATE	15:50:00
366	3,830.00	LSE	15:51:03
262	3,830.00	LSE	15:51:03
440	3,830.00	LSE	15:51:03
457	3,829.00	BATE	15:53:27
258	3,822.00	LSE	15:56:52
862	3,822.00	LSE	15:56:52
397	3,822.00	LSE	15:56:52
98	3,829.00	LSE	15:59:59
1106	3,828.00	BATE	16:00:02
870	3,829.00	LSE	16:00:02

775	3,829.00	BATE	16:00:02
789	3,829.00	LSE	16:00:02
828	3,829.00	LSE	16:00:02
660	3,827.00	BATE	16:00:42
69	3,827.00	CHIX	16:00:42
934	3,827.00	BATE	16:00:42
150	3,827.00	CHIX	16:00:42
361	3,825.00	LSE	16:00:59
772	3,822.00	LSE	16:03:17
526	3,823.00	BATE	16:03:58
208	3,823.00	BATE	16:03:58
674	3,822.00	BATE	16:05:11
71	3,820.00	BATE	16:06:06
995	3,820.00	BATE	16:06:07
448	3,818.00	BATE	16:07:05
406	3,814.00	BATE	16:07:35
4	3,814.00	BATE	16:08:00
1102	3,822.00	LSE	16:11:50
1068	3,822.00	BATE	16:11:50
758	3,822.00	BATE	16:15:24
436	3,820.00	BATE	16:15:26
8	3,820.00	BATE	16:15:26
456	3,820.00	BATE	16:15:26
437	3,820.00	BATE	16:15:26
381	3,819.00	BATE	16:15:30
390	3,823.00	BATE	16:20:11
1089	3,824.00	BATE	16:20:11
311	3,824.00	BATE	16:20:11
114	3,824.00	BATE	16:20:11
141	3,824.00	CHIX	16:20:11
927	3,824.00	BATE	16:20:11
442	3,824.00	BATE	16:20:11
380	3,824.00	BATE	16:20:11
358	3,820.00	BATE	16:20:30
227	3,820.00	LSE	16:22:13
132	3,820.00	LSE	16:23:33
506	3,820.00	LSE	16:23:33
753	3,819.00	LSE	16:23:34
823	3,819.00	LSE	16:23:34
595	3,819.00	LSE	16:23:34
100	3,819.00	LSE	16:23:34
588	3,819.00	LSE	16:23:34
454	3,818.00	BATE	16:24:25
98	3,818.00	BATE	16:24:25
188	3,818.00	CHIX	16:24:25
790	3,818.00	BATE	16:24:25
488	3,818.00	BATE	16:24:29
375	3,818.00	LSE	16:24:29

304	3,818.00	LSE	16:26:01
151	3,818.00	LSE	16:26:01
268	3,818.00	LSE	16:26:04
129	3,818.00	BATE	16:26:20
332	3,818.00	BATE	16:26:20
799	3,817.00	BATE	16:26:24
177	3,817.00	BATE	16:26:24
193	3,817.00	BATE	16:26:24
179	3,818.00	LSE	16:27:14