Ministers' concerns centre on a number of practices, which, though not illegal, appear contrary to the spirit of the legislation.

ECONOMIST: Social housing

Though not illegal, this does allow corrupt brokers to hide illegal late trades in a batch of otherwise legitimate trades.

ECONOMIST: Today Putnam, tomorrow the rest | The

Doctors can use some organs from donors who have just died, but though the practice is not illegal, there are currently no laws to govern it, leaving some doctors wary of the procedure.

BBC: Pressure for organ donation review