Vans Gisele pump
I'm not a particuarly big fan of trainers but it's worth having a pair or two for hangover days or incase doing sport suddenly seems like a good idea. I like these pumps by Vans because they could almost pass as ballet pumps, and have a cute mary-jane style strap. £29.99 from Office, available in UK sizes 4 to 8. Also available in beige with orange piping.