Bookkeeping, payroll, VAT - in London - repost

I am looking to hire someone on an ongoing basis to assist with bookkeeping, VAT and payroll activities at my firm. I imagine there will probably be about 2/3 hours of work a week. Previous experience dealing with HMRC is preferential. As is location in London. Services needed include: Accounting and VAT services: Ongoing bookkeeping services Issuing of Sales invoices Preparation of Quarterly management accounts Aged Debtor and Creditor Reports Preparation of VAT quarterly returns and reconciliations intrastate declarations Payroll services Monthly and year end payroll processing Filing year end return (P35) with HMRC Preperation of monthly payslips Potentiall dealing with P11 and P11D forms