Loads of people I know don't realise they can get various benefits (I didn't realise I could get housing benefit with dp working, for example) so it is well worth checking out www.entitledto.co.uk to see. Also very good for seeing what would happen if you took a new job or whatever.
Sorry, not really an AIBU, but could really make a difference to people lives, so thought I'd stick it where it would get seen.