Highlights from www.skysports.com are geoblocked here, so it could be the same for streaming from an American channel if you try to watch online in England.
London based UK-expat for nearly a decade here. Yes, usually you are geoblocked on your own subscription, but sometimes BT Sport will pick up a US based game, never hurts to check. More generally, soccerlivetv is great website resource for listing channels by country that a game is on, and if all else fails, deposit 30-40 bucks with bet365 and they willl have a video screen you can watch on your computer. FInally, AO has a chapter here in London that shows games from time to time, might be worth reaching out to them/their facebook page to see what if anything they are doing.