The first few months of BN2 production used up the earleir "BN1 style" fenders and most of them went to the larger front wheel arch cutout and the rear lower swage line continuing after the wheel arch pretty much by late October and into November of '55.
George isn't yet registered in the Hundred Registry I maintain so I wouldn't want to be the one to suggest the fenders on this car may not be original because I cannot be sure of the chassis and body numbers of George's car. The chassis numbers I do have for the car (unknown source so not official)suggest it was built in May of '56 in which case the front wheel arches should be the larger cutout and the rear fender swage line should continue.
Also Marks memory of his dad's '56 was accurate in that by spring of '56 the interior leather and vinyl would be the Teal blue colour on a Healey Blue car.
As somebody else mentioned perhaps on another list, there are many things not accurate on this car including the black interior in a Healey Blue car, swapping of o/d and ignition switch, BN1 o/d escutcheon, etc.
Though it's a gorgeous car, it's a bit of a shame that the one opportunity for much of the motoring enthusiasts out there to learn about a BN2 is a bit less than the best or most accurate example.
I'll just slip my flame suit on now!