Chelsea carrier?

[carrierbarry]

Inside the National Army Museum, Chelsea, London there was a MKII carrier, sandy in colour. It was on display up on the 1st floor.
I always wondered how they got it up there. I often thought they must have built the museum around it.
A friend of mine visited the museum over the weekend. When I asked about the carrier "it has gone."
Anybody got any idea what happened to it?
It was a complete little cracker....