Statement Of Comprehensive Income [Abstract]

HEADLAM GROUP PLC - Filing #1587521

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of comprehensive income [abstract]
Other comprehensive income [abstract]
Other comprehensive income that will not be reclassified to profit or loss, net of tax	—	—	—	—	—	—	1,800,000 GBP	—	—	—	200,000 GBP	—	—	—	—	—
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Reclassification adjustments on exchange differences on translation of foreign operations, net of tax	—	—	—	—	—	—	4,800,000 GBP	—	—	—	– GBP	—	—	—	—	—
Other comprehensive income, net of tax, exchange differences on translation of foreign operations	—	—	—	—	—	—	1,200,000 GBP	—	—	—	900,000 GBP	—	—	—	—	—
Other comprehensive income that will be reclassified to profit or loss, net of tax	—	—	—	—	—	—	6,000,000 GBP	—	—	—	900,000 GBP	—	—	—	—	—
Other comprehensive income	6,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	7,800,000 GBP	1,800,000 GBP	200,000 GBP	– GBP	700,000 GBP	– GBP	900,000 GBP	– GBP	– GBP	– GBP
Comprehensive income	6,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	16,600,000 GBP	22,600,000 GBP	20,500,000 GBP	– GBP	19,600,000 GBP	– GBP	900,000 GBP	– GBP	– GBP	– GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	—	16,600,000 GBP	—	—	—	19,600,000 GBP	—	—	—	—	—