Office assistant, PA, client management

I run a small marketing consultancy and I am looking for, mainly a virtual PA, who can manage my diary, undertake some office admin and contact clients from time to time to give them updates on projects, contact reports for meetings etc.

This can be home based, but would need a certain amount of time at my office.

I am based near slough, so looking for someone who is quite local.

I can not say how many hours a week, but would be hourly paid. I am beginning to get very busy, so I guess hours will increase.