... then this brand might be of interest Otto + Ivy, they sell beautiful ladies' shoes and boots in that size range. I've got no connection with them, just came across them last week in a comment on a Instagram post and have since bought a pair of their boots. The boots are fantastic and the customer service from the owner Laura has been really fantastic. I'm a size 41.5 / 42 so while it's a pain finding stuff on the high street, my feet are probably too small for some of their styles - but I imagine they must be an absolute god send for those with size 43 and upwards fee (from the comments on their social media, that seems to be the case).