ok,
so after speaking to the Lexus main dealer that serviced the car last they have confirmed that the cam belt and service was completed coming to a total of over £700 which is more like it plus the previous attachment at the same time so all in all about £1300 on the last visit which has now rested my mind, i did asked for a copy of the invoice with no bank details obviously but they have said that they have changed there computer systems which was in 2003 therefore cannot print off previous invoices which is a pain, don't think i will be able to get a copy from anywhere ? looks like as said in previous post that it has just been mislayed, oh well at least its done, thanks for the input guys.