Today I received the following reply:-
Mr Davey
We are writing in connection with your request for a motor insurance quote.
Unfortunately we are unable to quote for modified vehicles in your particular postcode area (LS) due to our bad claims experience over the last 2 years.
We do have one underwriter who can offer rates in this postcode but they only insure vehicles up to 250bhp.
Sorry we are unable to help.
Regards
Neil Fehily
Greenlight Insurance

The car is kept in an alarmed garage and fitted with a CAT 1 Clifford alarm.
I've never been turned down before.
Jon, can you shed any light on this? My postcode is LS21
Andy