It is so nice to read so many supportive posts and I really feel for you songstress.
I agree with everything that has been said about seeking financial advice from CAB, having a benefits check and all the other suggestions. Try to pursue these ideas if you feel able to.
I would also concentrate on finding friends who are in a similar position. The food bank is a good idea and also anything to do with animals/ animal rights. Volunteering at a local dog/ cat shelter, volunteering at a wildlife hospital - have a look to see what opportunities there are in your area.
We don’t have much ourselves, but we did once, so sometimes I struggle with resentful and bitter feelings. However, I now have lots of friends who enjoy the simple things in life like I do - volunteering and working with animals, walking, cycling. Keeping busy also keeps my mind from thinking bad thoughts, worrying, feeling anxious etc.
I enjoy buying clothes off Ebay or from charity shops and no shame in that, my friends do the same. We enjoy getting a bargain!
HMRC are a nightmare (we were self employed) and I’m so very sorry to hear that they dropped this on you. It is so unfair when you have reached a stage in your life when money is tight.
Wishing you all the very best and hope it all works out for you x ?