Ok. One of the biggest things that I miss from the US is getting a decent hotdog. I wanted to start this thread to see what people have found.
I have kept my eyes open since I moved here to the UK. I have tried many, thrown away many, and there are a few I buy regularly now.
The best all beef that I have found that resemble the taste and texture of an American were these:

They are available through the online Ocado delivery service.
I also buy some frankfurters from a German store near BoroughMarket in London. They are smaller pork based casing franks that have the snap, if that's what you are looking for. They aren't exactly like a US pork casing Frank, but are pretty close.
Decent hotdog buns are also hard to come by. I find most are too wide. I haven't been able to find the more narrow, white sided tear apart ones that are common in the US.
I buy Heinz hotdog relish at the American Store in Notting Hill.
Any suggestions for hotdogs or buns?