I managed to get there in 2019. I was very impressed with it. My only complaint being I couldn't get near the Fairy Swordfish (Stringbag) because they had it roped off while they were doing some work on it.
The Concorde's guide gave the following explanation for the inclusion of the plane. Somebody at a meeting somewhere said they were going to ditch their Concorde prototype unless someone wanted it .. and the FAM rep got his hand up first.