I bought this set when it first appeared, simply for "nostalgia" purposes as I usually model German stuff. I quite liked it, I wouldn't agree that you "have" to replace the heads, I thought the faces were quite good, & somehow looked quite "British" (I can't explain this, they just looked like people you might meet in the street). However the part I liked least were the helmets. I'd have preferred some netting & "scrim" on them. The bayonets are too long, as mentioned above. I thought they caught the "look" of a WW2 Tommy quite well. That was before I bought the Dragon sets. IMHO the two Dragon sets, one of 4 "Commonwealth" troops & a later one of 6 figures are excellent, with the reservation that they are not Gen2 quality. Despite the "inaccuracies" listed above, they capture the look of the British soldier in NWE extremely well vis-a-vis photos. I can't recommend them too highly. The poses won't suit everyone, however, as some are lying down. The Bren gunner in the jerkin is my personal favourite, I only wish there were some more figures so attired. Very typically British.
It should be noted that the '37 & 40 pattern BD were worn at the same time in the same unit, dependant on availability. Infantry in particular, needed to "get underground" as fast as possible in Normandy, so acquired extra entrenching tools anywhere they could; especially prized were the bigger vehicle spades. The parts in the Tamiya kit are meant to depict these. What none of the sets depict is the "smachete", a large edged weapon similar to a straight kukri, which was issued usually to the gun group commander, & intended to cut brush to clear a field of fire. It also made for a vicious close quarter fighting weapon.
"Lord Raglan wishes the cavalry to advance rapidly to the front, follow the enemy, and try to prevent the enemy carrying away the guns. Troops of Horse Artillery may accompany. French cavalry is on your left. Immediate. Airey."