If you are maskless never wear an exempt lanyard or badge, that's almost as bad as wearing a mask, it's a mark of who's complying with the government, it says 'I agree with the government', it also marks you out for 'special attention'.
If you are challenged by security or shop staff, just say 'I'm exempt', do not qualify it with anything like 'I have xxxxxxx' or 'I suffer from xxxxxx' it's not your obligation to disclose any qualifying evidence of your exemption and the government have said you should not be challenged.
It is against the Equality act 2010 to demand evidence of your exemption.
If the person persists, tell them it's against the Equality act 2010, and they are personally liable to a fine of up to £5000, stress the personally and the £5000, that should shut them up.
If they discriminate against you, tell them they are personally liable of a fine from £900 to £9000 under the Equality act 2010, again stress the personally and £9000
Or just show them this....

Here is the whole pdf document...
All the best, clownworld
I found myself getting annoyed today when I was on the bus there was the announcer banging on about how you must wear a mask then about the police being there to come and get you for your obviously criminal behaviour of breathing then when I was in town I noticed how many signs arrow and pictures were up reminding you to keep your distance be a local hero it said in co op then I saw ques in shops just to go to next and argos I couldn't be arsed in the end I feel as though living in big brother madhouse sometimes
Well, the old saying comes to mind - 'you can't please all of the people all of the time' - it's impossible not to upset somebody. Humour is essential for good health and can be used to win people over. Anyway, of course it is up to you.
p.s. your memes cheered me up thus making me stronger at fighting the b.s. so thank you.
I think you should bring it back - why/who decreed it was 'low hanging fruit'? Plus you removed one of my posts along with it - not a problem really I can post it elsewhere . What is wrong with a bit of humour - one has to keep one's spirits up.
Thanks clownworld. I have the legislation, but this one is even better! I have just printed it off, and will carry it with me everywhere. That's why you'll see the likes of Sainsburys not challenging anybody. A lot of small shop owners don't know this though. I see you have changed your name a little. I hope you don't mind me just calling you clownworld.😊