Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-03-31 |
As at 2022-03-26 |
2021-03-28 to 2022-03-26 |
As at 2021-03-27 |
2020-03-29 to 2021-03-27 |
As at 2020-03-28 |
|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||
| Cash flows from (used in) operating activities [abstract] | ||||||
| Cash flows from (used in) operations | — | — |
18 . 3
GBP
|
— |
5,600,000
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — | — |
1. 8
GBP
|
— |
2,400,000
GBP
|
— |
| Cash flows from (used in) operating activities | — | — |
16 . 5
GBP
|
— |
8,000,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — |
1. 9
GBP
|
— |
2,700,000
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — | — |
8. 8
GBP
|
— |
5,600,000
GBP
|
— |
| Interest received, classified as investing activities | — | — |
–
GBP
|
— |
0 .1
GBP
|
— |
| Cash flows from (used in) investing activities | — | — |
2 5. 8
GBP
|
— |
20,200,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||||
| Payments of lease liabilities, classified as financing activities | — | — |
2 . 2
GBP
|
— |
2. 2
GBP
|
— |
| Interest paid, classified as financing activities | — | — |
6,200,000
GBP
|
— |
5 .7
GBP
|
— |
| Cash flows from (used in) financing activities | — | — |
7. 7
GBP
|
— |
3 9 .7
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — |
1. 6
GBP
|
— |
11 . 5
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — |
200,000
GBP
|
— |
300,000
GBP
|
— |
| Cash and cash equivalents |
24,300,000
GBP
|
24,300,000
GBP
|
— |
25 .7
GBP
|
— |
14 . 5
GBP
|