I looked into it, they publish the wage structure and average earnings and it varies by area but was generally £10-12 an hour which didnt seem too bad. But that was based on quite short and/or anti social shifts. So to make the upper end of that you would be doing lunchtime, nothing all afternoon then working all evening.
I wouldn’t bank on it being in demand though, speeking to my local kebab purveyor he’s thinking of shutting up as business has disappeared. People in generally just arent spending money on treats.
Maybe that might change as time goes on and things become more stable (but still isolated).