ADMIN AND BOOK KEEPING for small business

I run a small coaching business. I have one or two large clients and travel a fair amount for them. I need assistance, booking travel, invoicing, credit control and book keeping including VAT and tax returns. You will need to liaise with my accountant from time to time. I would prefer the possibility of face-to-face contact perhaps once a month, so you would need to live in London. I live in central London.