All photos have been taken in the same spot - look at the trees - in similar lighting conditions.
I would normally look at the mud and splashes on the tank to check for any similarities. However the tank has moved (turned?) between 2 and 3, obviously. That will have changed the position of the mud and splashes. However, the left sponson MG ball mount shows chips and wear to the paint - you might want to consider if they are the same between photos 2 and 3. It's the only individual feature on the tank I can spot.
Same tank, same place. I'm wondering what the tanks in the background are. Gun Carrier in the bottom picture & MkIX floating tank in the top one? The MkIX was tested at Dollis Hill.
