Couple I support in very tough circumstances. He used to work, she has max PIP for multiple health conditions inc CFS and pain that requires heavy brain-fogging painkillers. Now he has Stage 4 cancer and finished work some time ago. The effort of doing the best for his health meant it was weeks before she managed to make their UC claim. The UC journal notified success with the note that payment only from the date of claim could be challenged/appealed. Any help as to how to tackle this would be very very welcome.
Please have a read of the Citizens Advice guidance on UC backdating and one month as per my previous advice. You can also phone them or have web chat if you have any further queries.