I just think you shouldn't have given him all your details and him giving you scant information. It should have been the other way around. There is no point giving him your insurance details when he hasn't provided his. Your name, address, vehicle registration number and may be telephone no should have been more than adequate. On no account would I have given him my insurance details even if I was at fault. From the make, model & Reg No of your van, his insurance will pull up your insurance details in a flash.