This is a statement from one of the signatories to the "new evidence" letter. Seems to me that he is very much distancing himself from any crusading activity:
Ramon Marti is a chemist and the head of the Neuromuscular and Mitochondrial Pathology group at the Vall d'Hebron Research Institute, a public sector institution that promotes and develops innovative biomedical research at Barcelona's Vall d'Hebron Hospital.
Yolanda Camara is a biologist working in the area of Neuromuscular and Mitochrondial Pathology.
Mr Marti confirmed today: 'We are co-signatories on a scientific statement sent to the Great Ormond Street Hospital.
'As experts we're asked for an opinion and we give it but there's nothing else I really want to say.
'I, and I'm speaking now on a personal level, have sent this statement saying that as an expert I think this treatment could work but I'm not getting involved in the final decision because that depends on other factors I do not know about.
'I haven't seen Charlie and I'm a chemist, not a doctor. The letter says what it says and I can confirm that I signed the letter and I signed it because I felt I had to send it.
'Before I also sent a letter to Charlie's mother, signed solely by me, with basically the same message for her in case she wanted to use it through her lawyers for the trial.
'I don't remember exactly when it was sent but it was earlier this year when the trial was happening.
'The message in it was similar in that it said that in this type of illness, this type of treatment could have some kind of effect but of course I didn't offer an opinion about what should happen to Charlie above and beyond what those who know the case might conclude.
'Charlie's mum has that letter if she wants to share it with the press.
'Those have been my only two interventions in this case. I can't say that I recommend one thing or the other.
'What I can tell you is that I've sent information to the hospital. I don't know how that information has become public.'
Asked if he and Yolanda had sent the letter unsolicited, he added: 'No, we have had contact amongst ourselves as experts and we have had interaction with other actors who I'm not going to identify and we've decided to do this.'