GPs from abroad who have not been trained properly and cannot speak English to an adequate level must be prevented from treating patients in the UK, a British Medical Association (BMA) conference has been told.
Strict new controls should be introduced to prevent a repeat of the case of Dr Daniel Ubani, who killed a pensioner with an overdose of painkillers on his first and only shift in Britain, doctors heard.
Nigerian-born Dr Ubani flew into the UK from Germany and injected Dr David Gray, 70, with 100 mg of a pain relief drug - 10 times the recommended dose.
Dr Hamish Meldrum, Chairman of the British Medical Association, told delegates at the BMA's annual conference that a similar case must never arise.
He said the UK "seemed to be able to do little or nothing to check that doctors from overseas - especially from Europe - meet the proper standards of language and competence".
Dr Ubani was struck off the medical register earlier this month after being found guilty of making "recurrent mistakes".
His first application to work in the UK in Leeds failed after he did not get a high enough score on an English test.
A subsequent application, however, was approved in Cornwall, and he eventually went to work in Cambridgeshire.