Statement Of Financial Position [Abstract]

British Land Co PLC - Filing #3461638

Concept	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2023-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2022-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31	As at 2021-03-31
Statement of financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	—	22,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	27,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Investment property	—	—	5,677,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	7, 032 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Current tax assets	—	—	2,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	3,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Cash and cash equivalents	—	—	125,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	111,000,000 GBP	—	—	—	—	—	191,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Assets	—	—	8,290,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	9,910,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	234,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	234,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Retained earnings	—	—	3,742,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	4,994,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Share premium	—	—	1,308,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	1,307,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other reserves	—	—	15,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	5,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity attributable to owners of parent	—	—	5,512,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	6,753,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	—	—	13,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	15,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity	5,512,000,000 GBP	13,000,000 GBP	5,525,000,000 GBP	1,308,000,000 GBP	234,000,000 GBP	2,000,000 GBP	13,000,000 GBP	3,742,000,000 GBP	213,000,000 GBP	6,753,000,000 GBP	213,000,000 GBP	2,000,000 GBP	234,000,000 GBP	1,307,000,000 GBP	4,994,000,000 GBP	6,768,000,000 GBP	15,000,000 GBP	3,000,000 GBP	2,000,000 GBP	213,000,000 GBP	4,184,000,000 GBP	6,013,000,000 GBP	234,000,000 GBP	1,307,000,000 GBP	14,000,000 GBP	59,000,000 GBP	5,954,000,000 GBP	– GBP	4,154,000,000 GBP	234,000,000 GBP	5, 983 GBP	5,924,000,000 GBP	59,000,000 GBP	1,307,000,000 GBP	14,000,000 GBP	– GBP	30,000,000 GBP	30,000,000 GBP	– GBP	213,000,000 GBP	2,000,000 GBP	– GBP	– GBP	– GBP	30,000,000 GBP
Liabilities [abstract]
Deferred tax liabilities	—	—	4,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Liabilities	—	—	2,765,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	3,142,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—