"where the detrimental effects on public services"
You can repeat this racist misinformation as often as you want Ake, but there are no proven "detrimental effects by immigrants - on the contrary - our hospital services would be in dire trouble without immigrant doctors and nurses, our trains and buses would never have got onto the roads in the needed numbers.....
Immigrants came to Britain, worked hard and became invaluable members of the communities they formed and joined.   
Over the three decades I lived in London they revolutionised shopping - prior to the end of the sixties, you could't buy a bottle of milk after six o'clock on the Fulham Road or Camden High Street - the Asian corner shops put an end to that.
Apart from the cultural value of meeting strangers from foreign parts, immigration has proved a massive benefit to Britain.
"Detrimental effects??
Such stuff are the BNP and Ukip made of.
You really need to peep out of your Xenophobic bunker occasionally and visit the real world sometime.
Arguments like yours are the problem-causers, not your victims.
Your persistence in repeating untruths is little short of hate-speech - and inhuman, with it.
Jim Carroll