Experienced Bookeeper with PAYE 25 Hrs per Week in London

I'm looking for someone for approx 25 Hours per Week to manage and enter invoices, receipts, etc into our Web Based Accounting and Payroll .
The Invoice Entry and accounting is currently small volume. We also run a payroll for some 190 persons as a service to our own clients.
We're based near Ealing West London The work would initially be carried out at our Office but could be continued from home We are planning to be up and running by 1st March