Had chance to mooch about Dover today, before Robin gets the train back home. The seafront has obviously been recently redone and looks very good. The Castle is English Heritage and looks like it's well worth a visit. As well as the medieval keep, there is a roman lighthouse and the Napoleonic cliff tunnels.
The town museum has a 3000 yr old ship that was dug up, and nearby are the remains of a Roman villa. Should be plenty to keep me occupied.
Robin went for a quick recce round the castle and took this shot looking down from the battlements:
Sorry about the colour, but the light was fading.