HMRC has confirmed that the same rules regarding tax relief for homeworking will apply in 2021/22 as applied in 2020/21. So it will again be possible to claim tax relief on £6 per week, without producing receipts, etc.
A claim will also be accepted for a whole year, even if you work partly from home and partly from Society premises.
In order to claim, complete the form available on the Government website at https://www.gov.uk/tax-relief-for-employees/working-at-home