RAF Museum charges.
Heads up:
The RAFM (Cosford) is no longer free attendance despite having Lottery Money for that reason. There is a £3 fee for car parking which FWIW I believe is not playing the game when the lottery grant is considered. It may of course be the RAF, or Defence College, or whatever they call themselves this week who as landlord are also Tommy Tight****. I honestly believe that a visit to any such museum should be totally free, especially when the location is a Grant recipient.
I realise that the fee represents awesome value for money, but the principal remains.