They're not satisfied just reaching "Europe" though.
Their plight and desperate need to escape the horrors of war in their home country(ies) is wholly understandable.
Having reached Turkey, France, Italy, Greece etc. they're well away from the ravages of Syria and other war - torn areas.
Why then, the desperate need to continue on to the UK?
Answers on a very large postcard, I think.
You may well be right about the forthcoming referendum.