reducing work hours due to illness

Hi, I've been suffering for over a year with what was thought to be arthritis-turns out to be fibromyalgia, had to take 6 weeks off this year so far but was determined to go back to work as a chef.
I'm finding it unbearably hard esp coping with the exhaustion and pain. Work is stressful and physically hard.
What are my options? Can I reduce my hours?, go on short week and claim something for other days. I cannot afford not to work
I would be grateful if anyone could help thanks.

You should talk to your GP, your manager and HR and see if an accomodation can be made to suit you. I can't answer the claim part of your question; however I believe if you only work 20 hours per week, depending on salary you might be able to claim. You should contact your local SW office