Why would I be trolling? Because I am contradicting you?
I am literally telling you my experiences.
A linked website proves nothing when you talk about general population there. Common english folks hardly follow grammar that for instance, europeans strictly do. You might have heard at the weekend from Europeans who learnt british english and moved to England or older british people once in a while, which would match your experience as London is swarmed with Europeans, but based on my 10 years there, I heardly heard people use “at the weekend” and I lived in London for 5 of those and another 5 in regional areas. Again, don’t doubt your experiences as a londoner, but it isn’t as common in my experiences.