Here's a list of all the places that I know of hiring Chipmunks, dual rates quoted where published.
Jersey Aero Club, CI GBP102.00 p/h
BA Flying Club, Wycombe GBP136.80 p/h
Devon Airsports, Eaglescot GBP120.00 p/h
Fenland Aero Club, Fenland
Wickenby Aero Club, Wickenby POA
John Schooling, Elstree
Comed Aviation, Blackpool (gone bust?)
Liverpool Flying Club, Liverpool GBP130.00 p/h
Chester Flying Club, Chester POA
The list of places came from The Chipmunk Club magazine.
Have fun
WF.