Appreciate this is an old thread but I thought it would be worth updating in the light of my experince of the last 24hrs.....
More Than's underwriters have confirmed they do not cover SAR - No suprise
AXA turned me down flat
Sainsburys turned me down flat
Animal Friends have agreed to cover with a standard policy on the understanding this is 'Lowland SAR' - They have agreed to put it in writing, as soon as I have that I'll update with the contact details of the person who dealt with it.