Thanks for the info, quick Google found this web site http://www.europeanluscombes.org.uk and the following data.

Never heard of a airfield called Marshland however it is at Wisbech (EGSI)

Wisbech to Sywell route sounds about right, although it looks like their going to be late for dinner. Hope they all make it safely.

Sat 23 June Arrive Depart Time on ground
Popham 09:30
Bicester 10:15 11:10 55 min
Sackville Farm 11:45 13:45 2 Hr
Fowlmere 14:15 15:10 55 min
Marshland 15:50 16:45 55 min
Sywell 17:30 Overnight

Sun 24 June Arrive Depart Time on ground
Sywell 09:30
Croft Farm 10:20 11:15 55 min
Shobdon 11:50 13:50 2 Hr
Oaksey Park 14:40 15:35 55 min
Old Sarum 16:20