All the highest expert authorities were brought together several times and made to hammer out a strong and heavy tank, adapted primarily for the defence of this Island against invasion, but capable of other employment in various theatres. This tank, the A.22, was ordered off the drawing board, and large numbers went into production very quickly. As might be expected, it had many defects and teething troubles, and when these became apparent the tank was appropriately re-christened the "Churchill."
That's it! Thanks very much. I saw it in "Masters and Commanders: How Four Titans Won the War in the West, 1941-1945", but darned if I could locate the copy I read a few years back.