In reply to Richard White:
Just to provide you with a sample size greater than 1...
I also have both in the same size (40) and some lace-up Muiras the same size. I'd advise that you buy them by the euro size, as this is what they're made to, then UK sizes are applied using a conversion. I *think* that a UK 6 can be a 39 or a 40; two different shoes, same label.
Post edited at 13:02