Brits had a plethora of terrible armor, there is no need to get huffy about realism.
Early days of Africa the brits laughed at silly German panzers. Matilda senior was like the KV was an introduction to the eastern front.
Churchills were, for all their many faults, very well armoured for their design and perfectly capable in their role in British military tactics of the time. And capable of crossing any terrain you threw at them save for literally vertical climbs. But they could get damn close.
Comet was essentially a British Pershing in terms of armour protection, limited runs included the Tortoise (as numerous as ostwinds ever were), etc. etc.
Of course, they didn't have the best land force, but they were predominately a naval power up until WWII and invested heavily in the RAF throughout, hoping to use commonwealth territorries, Russia and America to provide numerical weight where they could not.
First rate artillery of any nation in the war only rivalled by sheer numerical weight levied by russia, plenty of time spent developing bombing techniques.
Brits are a viable WWII power and are credited as such with good reason. They just don't have white elephant KRUPP STEEHL designs for people to wehraboo over in RTS games. Because they designed them (see TOG II [hah], Black Prince) but learned earlier than most that enormous, monstrosity heavy tanks were not the future of armoured combat.