https://www.theguardian.com/technology/2017/aug/19/silicon-roundabout-gets-brexit-jitters

It was earlier this summer when Justin Grierson noticed that the number of “hackathons” seemed to be trailing off around “Silicon Roundabout”, the east London area touted as Britain’s answer to the Californian valley that is home to technology giants Google and Facebook.

“Last year there used to be at least two every weekend and now there might be about two a month,” said the freelance programmer who is a regular at the sprint-like design events for coders and others, which often bring him into contact with others in the sector.