Disclosure Of Effect Of Changes In Foreign Exchange Rates [Text Block]
| Concept |
As at 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 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of effect of changes in foreign exchange rates [text block] | — | — | — | — | — | — | — | — | — | — |
| Reserve of exchange differences on translation |
269,200,000
GBP
|
— | — | — | — | — |
190,900,000
GBP
|
— | — | — |
| Disclosure of information when currency is not exchangeable into another currency [text block] | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information when foreign operation’s functional currency is not exchangeable into presentation currency [text block] | — | — | — | — | — | — | — | — | — | — |
| Disclosure of summarised financial information about foreign operation [text block] | — | — | — | — | — | — | — | — | — | — |
| Disclosure of summarised financial information about foreign operation [abstract] | ||||||||||
| Disclosure of summarised financial information about foreign operation [line items] | ||||||||||
| Non-current assets |
3,409,300,000
GBP
|
— | — | — | — | — |
3,037,900,000
GBP
|
— | — | — |
| Current assets |
3,704,800,000
GBP
|
— | — | — | — | — |
3,791,500,000
GBP
|
— | — | — |
| Non-current liabilities |
2,135,300,000
GBP
|
— | — | — | — | — |
2,242,600,000
GBP
|
— | — | — |
| Current liabilities |
2,774,900,000
GBP
|
— | — | — | — | — |
2,667,700,000
GBP
|
— | — | — |
| Revenue | — | — | — |
10,285,100,000
GBP
|
— | — | — |
10,111,100,000
GBP
|
— | — |
| Profit (loss) | — | — | — |
442,800,000
GBP
|
442,800,000
GBP
|
430,000,000
GBP
|
— |
430,000,000
GBP
|
— | — |
| Other comprehensive income | — | — | — |
19,100,000
GBP
|
— | — | — |
99,200,000
GBP
|
— | — |
| Comprehensive income | — |
3,600,000
GBP
|
78,300,000
GBP
|
423,700,000
GBP
|
498,400,000
GBP
|
416,800,000
GBP
|
— |
330,800,000
GBP
|
79,100,000
GBP
|
6,900,000
GBP
|