Just to show what this looks like:
I’ve never had any problems with acceptance of this card, the slightly non-standard shape doesn’t seem to be an issue.
I’m not saying I’m worried about the risks of contactless anymore, just this is an effective way of disabling it for those who are. I agree with @alexs and others that the risk seems to be minimal. And with 
you’ll get a notification the first time a skimmed card is used, and the most you’ll be out of pocket (temporarily) is £30 with contactless. If they’ve skimmed your contactless details, they can’t use them for larger chip & PIN purchases.
So I think the convenience far outweighs the risk. I’m against even the hassle of a shielded wallet. I love being able to just tap my wallet to the reader and pay, no card removal necessary. 