Jalima, I know a few German ladies who found British soldiers too. I have a friend who was a major for years in Germany, whose wife is German. He told me that soldiers were told not to wear their uniforms in public.
The US is one of the few countries in the world, with which the UK currently has a balance of payments surplus. It's the UK's biggest export market - mainly pharmaceuticals, so I think Obama has a right to tell us what the situation is. The pharmaceuticals manufactured in the UK are mainly produced by foreign owned companies, which will very possibly relocate to the EU, because their EU market is actually bigger.
European non-EU countries up for grabs as trading partners are (off the top of my head) Iceland, Albania, Bosnia-Herzegovina, Macedonia and Serbia. I'm really not convinced that any of those countries are queuing up to buy our mechanical appliance, motor vehicles and electronic equipment, which are the UK's biggest exports by value. We currently export arms to the Middle East, but it would be silly to rely on exporting heavy equipment to the other side of the world, because shipping costs would be so high. China and India can produce and ship stuff more cheaply.
The idea seems to be that we can kill off our manufacturing completely and rely on financial services, which is in itself risky, because much of the business will possibly move to Frankfurt or even Paris.
I'm afraid I think the idea is barmy.
PS. Boris Johnson seems to have lost it completely. He's now called Obama 'ridiculous and weird'.