BA has done all Americans a favor and created an "English to English" dictionary so that US tourists in London can confidently ask for the "loo" (restroom), the "lift" (elevator), the "blower" (telephone) or the "bin" (trash can). This way US tourists will have a smashing time in the UK as long as their name isn't Randy. ;)
The dictionary can be found online in flash format at london.ba.com, created by NYC Agency.com and is also the basis of a poster campaign currently running in New York. I reckon that anglophiles are going to love this one.