Challenger 3: Could the tank's weight be a problem in war?

Could Challenger 3's weight be preventing it from being as effective as it could potentially be? Doctor Jack Watling, a Senior Research Fellow for Land Warfare at the defence and security think tank Royal United Services Institute, has suggested that the new 66-tonne Challenger 3 main battle tank (MBT) currently being developed, might be better if it was designed closer to the Army's Ajax vehicle spec. Dr Watling has launched his new book, The Arms of the Future, in which he analyses how the emergence of novel weapons systems is shaping the risks and opportunities on the battlefield.