Here is a page about the Discworld LARP Mike has written. Add more details as you see fit.
Let Mike know by email if you can't make it/can fill in etc.
Vimes - Tai
Carrot - Marc P
Angua - Melanie
Colon - Garrick
Nobby - Simon P
Lady Vimes - Michelle
Ridcully - Hendri
Rincewind - Warren
Bursar - d@vid
Lord Downey - Simon C
Teatime - Dave 69
Mr Boggis - Jonathan H
Done it Duncan - Lucas
Granny Weatherwax - Jessica
Nanny Ogg - Hila
Magrat - Beth
Dibbler - Sean F
Lord Rust - Reuel
Lady Selachii - Bronwen E
Lady Margolotta - Adrianna
Mr Slant - Dave99
William de Worde - Adriaan
Susan Sto Helit - Lara
Dr Whiteface - Brendan
Mrs Palm - Erica
Queen Molly - Andrea
Lord Vetinari/Foul Ol' Ron/The Librarian - DM/NPC