Only a couple of weeks ago I was reading about how the collapse of the Gulf Stream due to climate change is going to turn Britain into a frozen wasteland.
Either you misunderstood what they wrote or the writer - deliberately or not - misrepresented the process.
The Gulf Stream is a wind system starts some place around Florida, then heads NW across the Atlantic towards Britain and nearby countries, then onwards to Scandinavia before circling westwards and then S along the E coast of Canada and the US.
The air stream which arrives in Britain has been warmed up (winter) or cooled down (summer) on its way across the Atlantic, it has also accumulated a lot of moisture on the journey. This is where Britain's reputation for wet weather originates, although that applies more in western areas (Ireland, Wales, W England and W Scotland) than on the E side of England and Scotland. The high pressure systems affecting Britain and Western Europe are leading to more extreme weather with less precipitation. There is a high pressure system affecting the weather in the region right now and it has funnelled hot, humid air from N Africa to the region. Hot and dry, apart from the occasional thunderstorm. This is supposed to peak this coming weekend and drop away at the start of next week - it should be a lot cooler with some much needed rain.