Is the difference between American and British bacon the cut? How do I find lean, crispy bacon in Kent? I'm guessing a butcher, but how do I ask and what am I asking for exactly?
It is a different cut:
American bacon is pork belly. British bacon I think is back or shoulder, similar to Canadian bacon, but it's different than theirs too.
At the grocery store look or ask for Streaky Bacon. I can get smoked or non-smoked at Sainsbury's and Tesco. Other stores probably have it as well. I just prefer those two stores. The bacon is a nice thick cut and I like the flavour on it, I get smoked to get the US flavour. I don't have a good Aldi or Lidl nearby. It's not exactly like US bacon, but it's really close!
Do NOT get the Oscar Meyer brand if you find it. It's paper thin and not very nice.
To get your UK streaky bacon to be crispy and amazing cook it slowly so the fat in it gets a chance to render. We add a little bit of olive oil to the pan to help it along.