Doctors have been told that they must register allcomers regardless of their status, factor, but that's by the way.
Moving on, why should, say, a person running a simple single-property buy-to-let enterprise have to do the job that the State authorities are singularly unable to do? And if it was simply to help the authorities catch those that "slipped through the net" (a net with the biggest mesh imaginable) why the threat of draconian fines? Why not a reward for detecting an illegal who the Border Agency has failed to intercept? Employers are fined £10k per rogue employee, hauliers £2k per stowaway. What will be the penalty for letting a property to somebody whose entitlement to be here is invalid?
The penalty for the illegal immigrant? Free healthcare, free accommodation, free board and lodging, free legal representation to appeal their deportation. The Border Agency is supposed to protect our borders, detecting and removing those not entitled to be here. Meanwhile, employers employ people, hauliers haul stuff and landlords rent property. That's the way it should be. This shift of responsibilities from enforcement agencies to law-abiding people and businesses - making criminals of them into the bargain - is insidious and needs to be stopped, not expanded.