==One of the few British Tanks== 
 It was armed with a 77mm HV, a derivative of the 17 pounder, with the result that it was one of the few British tanks with the firepower to challenge late war German designs. 

 Given that from D-day to the end of the war, between 25% and 50% of British Shermans were 17-pounder armed Fireflys. Then add to that the small number of Challengers - then I think it's incorrect to say "few". It's perfectly true only a minority of British tanks had "the firepower to challenge late war German designs", but I think it's fair to say it was a substantial minority. They were not rare, as the word "few" implies.