Where to get help with a PIP tribunal

Having finally managed to get back on this forum after months of no access, I realise I never got around to asking what sources of help there might be for a PIP tribunal. We now have a date for this, and it's only a few weeks away. The CAB tell me they no longer have funding for this sort of thing, I did try whatever website it was which was supposed to show you what advocacy services there were in your area, only to find a seeming black hole covering SE London ...

Are there other bodies I ought to be trying, please? I think someone mentioned something about local council welfare officers, but can't remember anything else.

Thanks, Gordon. I'd spotted the bit about "welfare advice" in someone else's post, so have done that, but seemingly no joy - even trying 3 or 4 different postcodes. Everything else seems to refer me to the CAB, which is no use - apart from one thing, AgeUK, which might be of use. Goodness knows what you do if the person in question isn't over 50, though. Appalling, isn't it - a real postcode lottery.

Thought I'd add these here in case they're any good to someone else:

SCOPE helpline: www.scope.org.uk/helpline/

Also a useful CAB page for earlier in the process: www.citizensadvice.org.uk/benefits/sick-...-claim/fill-in-form/

I'd forgotten the Turn2Us find an adviser tool, too:

advicefinder.turn2us.org.uk/

(Mods, I hope you can merge all these posts!)