The Typhoon radiator went missing when it was at Freeman Field in the U.S. during the war. It (or the remains of it) has recently been rediscovered in an excavation there

I’ve seen both spellings used

The first one is actually in France, not the UK

The WWI and VC galleries in the redone IWM are excellent and justify a visit in themselves. The rest of it, I’d agree, is poor. But don’t let that put you off, see it for yourself and make your own mind up.

The Typhoon is indeed missing a functioning radiator. I wonder if there is some confusion here with the RAF Museum’s Tempest V?

So about £200k a year for your 100 hours (or £2k an hour) by the time you’ve added in hangarage, consumables (oil, coolant, hydraulic, cleaning materials, tyres etc) and the like. In reality 100 hours is a lot, unless you’re flogging the thing around the airshow circuit or hauling rides in it, so the hourly rate for the 20-50 hours most Spitfires are likely to fly each year would be higher

Some of the suggestions here are totally unrealistic based on the fact the OP has says he will be using public transport.

I would suggest Hendon, Science Museum, Cabinet War Rooms, HMS Belfast and IWM in London (since you have said that you are staying there) and would also recommend the RAF, Battle of Britain and Bomber Command Memorials (all in Central London). If you start trying to do trips like Coningsby and East Kirkby in a day by public transport from London you will rapidly lose the will to live.

I would also second the recommendation to visit the de Havilland Museum at Salisbury Hall (perhaps by train to St Albans then taxi) – it is relatively small but worth the trip to see three Mosquitos together.

Depending on the dates of your visit, Goodwood on the 15rh September would be worth a visit for the big Battle of Britain gathering of up to 35 Spitfires and Hurricanes (although many of them will also be at Duxford the following weekend)