Tax treatment of UK covid furlough payments?

Almost there with my (very) late 2021 tax return. I have UK "salary" entirely made up of furlough payments for 2021. Whilst resident of Japan (NPR) I carried out no work whilst in Japan for this. I am not employed by the company, just do regular contract work if I opt to. I was surprised to get furlough payments to be honest but not complaining.

Any thought on the NTA's treatment of this?

by steford