In pursuit of my current interwar interest I have just come across these.
The Tank Museum have published a set of short films about some of the vehicles in the collection, presented by David Fletcher MBE, and titled Tank Chats. These are available on YouTube (below).
I have set up a new page on the Interwar Tank Development blog to post these in a more permanent way.
The ones of particular interwar interest are:
#2 Carden Loyd
#3 Vickers Medium Tank MkII*
#4 Vickers Armstrong Type E
#5 Lanchester Armoured Car
Others in the series are
#1 The A13 Cruiser
#6 Vickers Light Mark VI B
#7 Mark II
An ideal way to use up a few spare minutes