~S~ Sged, yeah, you can buy a ticket on the day, it's just a bit cheaper in advance. Check the website for accepted cards, Maestro/Cirrus or Visa Debit should be OK.
Plans for Sunday are in the firming up stage - it currently looks like RAF Museum - Cosford which is not far from Birmingham. The visit to the Shuttleworth Collection has been postponed to another time due to traffic difficulties (local county show on there on the Sunday). Lots of cool Lufty stuff at Cosford - Me-162, Me-410 anybody? Also Avro Lincoln, all three v-bombers (Valiant, Victor and Vulcan) etc etc etc. You could probably get a flight home from Birmingham International - dead easy to get to and tons of flights to continental Europe.
Glad to hear you're heading to Duxford deskpilot - Head to the Red Lion for a swift half before heading home - beats sitting in traffic any day. The serious drinkers are getting there on Friday to get a headstart. I think the official rendezvous for Saturday is breakfast at the RL (9ish - later if I'm hungover) before heading to the airfield.