For a while, earlier this year, the British immigration system was working rather well. Asylum applications were way down, while more people than ever before were getting in under the Highly Skilled Migrants Programme.
Some of the latter exaggerated their skills to get in (including, notoriously, the one-legged man who claimed to be a roofer). The sensible response would be "oh well – immigrants enrich our society and do the jobs that most native-born Brits are too lazy to bother with; let’s not worry if one or two are faking it".
Unfortunately, far too many British people are demented xenophobes for that attitude to prevail. As a result, visa rules have become so harsh that it now takes over three months to get in – not great if you’re a foreign expert flying in for a conference, for example.
Oh well, it was nice while it lasted.