NeverFirst, Nava Design Milano is a brand I had never ever seen or heard of. Dang!

Seriously, I've been living in the US too long.
BTW, if she wants to go upscale I'd also look at S.T. Dupont, Valextra and Dunhill. All should be available in London. Plus Goldpfeil from Germany.
Also from Germany there is Bree. Excellent brand in all regards. They are the German Tumi, so to say, with more edge to it than Tumi. Pricewise a bit below Tumi.
Till