I am looking for someone to work as my VA

I need someone to work with me as my VA on an ongoing basis. I expect to need 15 hours per week. I need to work with someone who is based in UK as needs to be available during UK office hours. Needs excellent English, good customer service style and to carry out confidential work. Tasks will include managing email inbox, sending emails on my behalf, preparing Word and PPT docs, some diary management.