Testing testing testing.
Without it, theres no hope for the restart.
If all players are regularly tested - and that means i'd say at least 3 times a week, ideally more, then it should be a safe environment. Safer than working at the asda, yes but as mentioned, physical contact in football is necessary. Thats the difference between an Asda worker and a footballer in terms of this - they can socially distance (although i realise realistically it doesnt happen all the time.) whereas footballers cant. Asda workers wont be tested though, If 22 men are all tested and negative, there is obviously no danger of the virus being spread or need to socially distance while on the pitch.
Without testing it all falls apart obviously.