Virtual Admin Help

I'm a south west based business consultant, but now have over 30 clients to deal with and I need support to manage my diary and help arrange my travel. I'm a competent consultant, but not a good administrator! I would also want you to raise my invoices as well as suggest other admin tasks you might be able to take off my hands. Although this work can be done remotely, preference will be given to someone locally as there may be requirements to collate manuals for training courses I run. I live in Chard, Somerset.