Are those sizes for an E (regular) width? If yes then I take the exact same size as you in Gaziano & Girling and Edward Green. I'm a UK10E on Carmina's Forest last in a boot. From all the reading I've done I'm surprised that a 44 in the U last was too large. Were they too large both in terms of length and width?Please let us know how a 43.5 fits you when you get it. It would really help me to determine my size in Vass. By the way do you have any experience with the F last?