Just adding a plug for the RE museum at Chatham.
Visited it last weekend and this is no 'ordinary' regimental museum, excellent collection of vehicles and artifacts, blood-stained maps of Waterloo, DDay Steam Engine, IRA mortars made from Gas Canisters etc etc. (the Bulldozer Kitted for air-dropping is also superb).
Very friendly and helpful staff.
Highly reccomended.
Cheers,
Adam.