I've looked at these HMV Premium releases before and they've always seemed rather mis-named to me. Harryhausen is one of the all time greats so if anyone deserves the deluxe treatment, it's him, and I don't really believe reheated years old US discs with some lobby cards really cut the mustard. He should be getting brand new multi hour docs exploring every tiny detail of the great man's work and life.
At least the original mono is on the disc, and it's in black and white too. Some studios dabbled with the dark side in colourising Harryhausen classics in the past, and boy were they ugly.
Maybe there just isn't the money in old movies anymore.