I think it is often the case that displaced families will migrate from a danger zone and whilst they might be safe, there is no prospect of work or providing a future for their family, so will look further afield. The vast majority do however stay in the region in which they are displaced. Of those that travel further, I found this posted by
@SteMerritt on an earlier page:
I would say that a major factor in "why the UK?" is that many will speak some English (more likely than French and far more likely then German) and many will have some family connection. And yet we still lag significantly behind even countries like Greece on the numbers we take, who are way, way ahead of us per capita (and nobody other than the Greeks really speak Greek!).
So language and links will play a part. But it is still a comparatively small number though.