I need a professional female voice over artist to create radio demo ads

looking for a professional FEMALE voice over to create demo advertisements for new online radio station. Looking to spend no more than £10.00 per demo need approx 10 demos to start with - but looking to create a long term contract with the right person to do weekly weather reports and all FEMALE voice over ad work for our advertisers that advertise on our station possibility of loads more work to come . British accent required.