Sage 2013 checking and correcting MUST BE UK BASED

We have a Sage 2013 file that has been created for us...
We were originally using TAS books for the first 3 years of trading and Sage for the past year.
We decided to have all TAS Books transactions entered onto a new sage file and also our last year which was on a Sage file. The person who created this file got so far and realised it was a bit out of their depth to complete

We require someone to check all the entries on the Sage file, this can be checked against the previous TAS books file or .PDF invoices, also can be checked against the previous sage file. The purchase invoices seem to be correct, we're not so sure about the bank transactions.
There are only 880 sales invoices over 4 years so this is not a big project

We require a quote for your hourly rate - you must be UK based - have good feedback and please let us know whether you are available to start straight away as we need this completed quickly