get the insurance company to mail you over insurance confirmation, then go to the post office and tax it with your v5 and mot certificate.
whats the big drama
ive taxed a car at the post office with a photoshopped insurance certificate before because mine hadnt arrived. just make sure you select the counter with the old biddy on it.
no biggy.
Fax details of an insurance policy is not proof to get tax. You cannot do it without a) a proper valid insurance certificate or b) a valid covernote or c) proof it's on the MID. Photocopies and faxes are NOT acceptable.
ever seen a bretachre insurance certificate? Its just a black and white printout and looks like a photocopy anyway