It's actually a Mark V. The tracks were Johnson's snake track which was used on the Medium D and a number of other prototype
vehicles after WW1 - see the Medium D article on Landships II.
Regards,
Charlie
Went searching - that Alamy organisation is one which should be cast into the fiery pit. Attempting to
monetise public domain images - only an American lawyer or the British Govt. could think that one up.
Here's the series - I've saved them with the IWM Q numbers.
