I think they should start at the top and restrict the largest group of immigrants to this country first. Which nationality was that? Ah yes:
Remember that next time the Mail screams about '600,000 immigrants a year', not only are 1 in 4 actually British but only 6000 were asylum seekers. Osem might like to ponder that last statistic before he conflates asylum and immigration in the usual tabloid knucklehead way again (yes, I am having a go, deservedly).
http://news.bbc.co.uk/1/hi/uk/7411205.stm