Hi,
I did,nt take a passport or driving licence to my assessment so i was asked for two lots of proof of ID, the appointment letter was,nt any good, as luck had it i did take a utility bill and i,d got my bank card with me, i,m assuming its two lots of ID if you don,t take photo ID. hope that helps, as i don,t think a BC alone will be enough proof for the Atos receptionist, whom i must add was very rude to everyone that came in while i was there.
Chrissy V