An early 17-pounder still needs a tank able to carry it

How would earlier introduction of the 17-pounder change British tank development?

It could bring tank destroyers and heavier designs forward, provided a suitable vehicle and suspension were available.

An earlier 17-pounder would encourage Britain to pursue tank destroyers and more heavily armed tank designs sooner. The gun alone, however, does not create a usable fighting vehicle. Designers still need a chassis, suspension, and running gear capable of supporting its weight and recoil. The exchange separates weapon availability from the industrial and automotive work required to place that weapon in service.