Your argument for "the appearance of long term climate change can be caused by immigration" is that an individual high temperature was recorded at an RAF base, ironically one of the places in the country you're least likely to find an immigrant. It was one of a number of places to record a temperature over 40 degrees, compared with the previous high point of 38.7 degrees (including all the airports and RAF bases and urban heat islands). Indeed even if we choose to believe Toby Young's tinfoil hat brigade's claims that it was definitely boosted by a jet engine and not the more standard explanation for minute-to-minute temperature rises of the sun coming out, it was still hotter than any previous day ever recorded anywhere in the UK before that supposed jet engine landing, and I'm pretty sure we've landed jets there in summer before.

Nobody honestly believes that the reason the UK is recording hotter temperatures all over the country is because immigration is driving Typhoons to land differently at RAF Coningsby