It would be amusing to know if Pravda could field Churchills if there were actual LL Churchills apart from the LL Matildas, Shermans, Lees and Valentines

Actually ezekill, yes there were lend-lease Churchills. A total of 301 Mark III and Mark IV Chruchills were sent to the USSR via arctic convoys. The 5th Guards Tank Army used them during 1943 at the battle of Kursk and the 4th battle of Kharkov.