The South Coast (Brighton, Shoreham, Worthing) is the business mate but has a pebble beach, which is like trying to launch and land on a cheese grater

If you have trasport head for Camber Sands:
http://www.villagenet.co.uk/dr-syn/villages/camber.phpOr Pevensey Bay:
www.pevensey-bay.org.uk/Miles and miles of golden sand

If you need any further info on the area drop me a mail - it was home for 33 years