According to http://the.shadock.free.fr/sherman_minutia/index.html there were only 1,686 M3 Grants ordered by the British Purchasing Commission - 685 from Baldwin, 501 from PSC and 400 from Pullman. Most of them (1,212) were riveted-hull M3 and the rest was composed of 381 riveted-hull M3A5 diesels, 83 welded-hull M3A3 diesels and 10 welded-hull M3A2 with aircraft radial engine. Whole order was covered by the WD serials from T-23504 through T-25188 plus one odd T-25589.
On the other hand both Tanks Encyclopedia and Wikipedia say that altogether Britain was allocated with 2,855 Grants, which leaves 1,169 vehicles for the Lend-Lease supplies. Is anybody able to give their variant details and WD serials?
Cheers
Michael