Worcestershire GP Dr Stuart Gray and his brother Rory have been campaigning for greater checks on EU doctors working in the UK since the death of their father David in 2008.
Mr Gray was killed when Dr Ubani administered 10 times the correct dose of diamorphine by mistake during his first shift in the UK.
Dr Ubani has been struck off by the GMC and cannot work in medicine in the UK, but continues to practise in Germany.
Call for exam proof
The Grays say they have never been shown proof that Dr Ubani actually passed medical exams, and heckled him at a 2010 conference, calling him a ‘charlatan’.
But a German court has now ordered Rory Gray – who lives in Germany – to write to Dr Ubani promising not to insult him, and to pay thousands of pounds in legal costs.
Dr Gray told GP: ‘I don’t understand it, it’s sickening really and makes me very angry.’
He said his brother was likely to have to pay up to 8,000 euros to cover legal costs.
‘If Rory tries to appeal, it could end up running into tens of thousands of euros, so he’s between a rock and a hard place – he can’t just not pay it,’ Dr Gray said.
The case ended up in court because earlier attempts by Dr Ubani to sue the Gray brothers had failed, and they had taken legal advice suggesting they should not be forced to write to the German locum.
‘Rory took legal advice – the lawyer said he didn’t need to write. There was a feeling that - this man has killed my father, why should I write this letter to him.’
Dr Gray said he did not believe UK courts would have reached the same conclusion on the case.