For anyone down in the south east, you could give Oxted Trimming a call, they do all sorts of trimming stuff
and all Caterham Seven's.

They have done some roof repairs for mine in the past and made a rain cover I can use in
pelting rain with the back window open 

Contacts are Sarah and Eddie Marriot 

http://www.oxtedgroup.co.uk/pages/trimming-services.shtml