Hi Princesbold. Yes, try First Steps Nursery at Chichester College. They keep children up to 6pm if required and have very nice facilities. My daughter went there and a lot of her schoolchums did too. Their website is http://www.first-stepschildcare.co.uk/ Failing that try West Sussex County Council's website: http://familyinfoservice.westsussex.gov.uk/FISO/PublicEnquiry/
Hope this assists. Please tell your friends about Mumsnet Local in Chichester, the more people we get contributing, the more use it is to all of us.
skylarks run a before and afterschool club very reasnable prices,in bosham and fishbourne they do school pick ups and home drop offs cooked meals and a holiday club, people are very frinedly who run it well woth a look.