My wife and I are going to London next month. I've scheduled a shave at Trumpers Jermyn Street location, and my wife is having her hair done at a salon just off Savile Row about a 10 minute walk away. I will have about an hour or two of spare time before she finishes her appointment. I'd appreciate any recommendations regarding good places to pass the time in that neighborhood...coffee house, clothing shops, galleries, etc. Thanks in advance.