Statement Of Cash Flows [Abstract]
| Concept |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for finance income |
1,900,000
GBP
|
1,300,000
GBP
|
| Adjustments for amortisation expense |
4 .1
GBP
|
1,600,000
GBP
|
| Adjustments for depreciation expense |
13,700,000
GBP
|
13,300,000
GBP
|
| Adjustments for gain (loss) on disposals, property, plant and equipment |
1,500,000
GBP
|
600,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Purchase of investments other than investments accounted for using equity method |
600,000
GBP
|
3,500,000
GBP
|
| Proceeds from sales of investments other than investments accounted for using equity method |
1,000,000
GBP
|
9,400,000
GBP
|
| Purchase of financial instruments, classified as investing activities |
300,000
GBP
|
6,800,000
GBP
|
| Proceeds from sales or maturity of financial instruments, classified as investing activities |
6,800,000
GBP
|
20,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Dividends paid to equity holders of parent, classified as financing activities |
25,900,000
GBP
|
2 4.4
GBP
|
| Dividends paid to non-controlling interests, classified as financing activities |
4,300,000
GBP
|
3,900,000
GBP
|