"Why hasn't he implimented this before " - could it possibly be that there is a general election comming and Noo Labour are realising that immigration is a vote loser so they are attempting to close the stable door etc?
>>Could the infrastructure of this country stand another 5 years of Labours immigration policy?
I have just noticed, you gave them the credit of it being a "policy".
Could it actually be incompetence, laziness, disinterest, lack of planning, lack of control and so on that has allowed rampant immigration since they have been in power.