Just in case anyone else is stuck with these guys, their rates dropped yesterday so may be a good time to tie into a new deal!
Just a bit of background, I had a discounted mortgage with them from the easy mortgage time. Bubble burst, interest rates dropped/plummetted..their Standard variable rate INCREASED to 5.49% over the BOE base rate. Scandalous.
Anyway, you can check out their new rates for existing borrowers here http://www.accordmortgages.com/products/ebt.html
select "Download our Existing Borrower Transfer and Additional Loan Guide".
Hope this helps.