Found some more on this

To make sure there is no ambiguity, this is from Brian Deer,an investigative journalist whose personal crusade has been to discredit Andrew Wakefeild and his research findings. He is openly biased against the Study and Wakefeild and is unlikely to offer information that supports the other side of this issue.

Andrew Wakefield research exposed: the MMR investigation

But the investigation discovered that, while Wakefield held himself out to be a dispassionate scientist, two years before the Lancet paper was published - and before any of the 12 children were even referred to the hospital - he had been hired by a lawyer, Richard Barr: a jobbing solicitor in the small eastern English town of King's Lynn, who hoped to raise a speculative class action lawsuit against drug companies which manufactured MMR.

Unlike expert witnesses, who give professional advice and opinions, Wakefield had negotiated a lucrative contract with Barr, then 48, to conduct clinical and scientific research. The goal was to find evidence of what the two men called "a new syndrome", intended to be the centrepiece of (later failed) litigation on behalf of an eventual 1,600 families, mostly recruited through media stories. This, publicly undisclosed, role for Wakefield created the grossest conflict of interest, and the exposure of it by Deer, in February 2004, led to public uproar in Britain, the retraction of the Lancet report's conclusions, and, from July 2007, the longest-ever professional misconduct hearing by the UK's General Medical Council.
In the Lancet, the 12 children (11 boys and one girl) were held out to be merely a routine series of kids with developmental disorders and digestive symptoms, needing care from the London hospital. That so many of their parents blamed problems on one common vaccine struck an understandable chord of concern. But Deer discovered that the children (aged between 2½ and 9½) had been recruited through MMR campaign groups, and that, at the time of their admission, most of their parents were clients and contacts of the lawyer, Barr. None of the 12 lived in London. Two were brothers. Two attended the same doctor's office, 280 miles from the Royal Free. Three were patients at another hospital clinic. One was flown in from the United States.
Penetrating veils of medical confidentiality, he discovered that the hospital's clinicians and pathology service had found nothing to implicate MMR, but that Wakefield had repeatedly changed and misreported diagnoses, histories and descriptions of the children, which made it appear that the syndrome had been discovered.

As revealed in The Sunday Times in February 2009, the effect was to give the impression of a link between MMR, bowel disease and the sudden onset of regressive autism, when otherwise none was evident. The hospital's pathology service had repeatedly declared bowel biopsies from the children to be normal, and not one of the 12 cases was free of critical mismatches between the paper which launched the vaccine crisis and the kids' contemporaneous clinical records. Some children showed signs of autism before vaccination. Some were deemed normal months afterwards. Some did not have autism at all.