" I fear that if Great Britain were to leave Europe, we could be left to the tender mercies of the UK government."
That is a profound argument for remaining in the EU. The British Government has, since the onset of Tony Bliar, imposed police-state legislation on citizens of the UK and has not failed to use it. The News of the World was prosecuted by the British Government for hacking mobile phones at the very same time that the government was doing the very same thing, justifying it under law. Under Thatcher, assorted Irish were imprisoned on false charges; I don't refer to the murderous thugs then rampant in Northern Ireland. There are indeed times when Her Britannic Majesty's Government does seem to rquire a legalistic tap on the shoulder from outside the Houses of Parliament and Buckingham Palace.
I will grant Boris Johnson his concerns about Napoleon, Kaiser Wilhelm II and Hitler (as well as Louis 14th and William the Conqueror, and the French may indeed fear a new "Black Prince" and Henry V)), just as I grant Putin's concerns about the first three named; but then the UK and the French should not have built the Channel Tunnel if those concerns were to be still seen as serious. Indeed, I was always taught that the UK's nuclear weapons, aided by those in the USA, were responsible for keeping the peace in Europe.
The European Union clearly needs political reform, and its abuse by the financial industry should be halted. But for the UK to leave the EU will achieve nothing in these areas as the political and financial rapists of this world will simply keep on keeping on in other ways.