Virtual assistant

I am looking for a virtual PA with following duties:
expenses
Simple book keeping - (it is very simple, no need for any formal qualifications and no sophisticated software like SAGE involved only spreadhseets)
VAT returns
Quotes
Some ad hoc telephone answering - (doesnt matter if you are not available all the time...very few calls and none are urgent)
Email/web marketing campaign assistance - somple simple website updates/emailling/general correspondence/
very occassionally some bill payment chasing
5- 10 hours a week. More hours to start with to sort out my backlog!!!!
Will need to travel to my office (Great Witley to pick up all the necessary paperwork in the first instance.