If you walked into my shop you could use it.......
I would need to see some form of photo identification ie passport or driving licence......
It would be processed by my card machine and I would get charged slightly more (2.5% instead of 2% ).
Having said that I have a shop in a tourist location and we get people from all over the world using all sorts of cards.
I dont think the major retailers and garages etc etc would accept the card.
They will in 99% of cases only accept a chip and pin cards.....many of them will not, I suspect, accept a chip and signature card.
Hope this helps