Jeez.
There was a whole slew of paedophile activities that have been exposed in the last decade or so. These included awful examples of childcare workers, entertainers, sports coaches, Catholic and Anglican priests, (a very small number of) Members of Parliament, and others in (and out of) the public eye. The grooming gangs of Muslim men are/were just one of these. The term grooming gangs is used not to lessen their awful crimes but to accurately label their methods - different child rapists have different methods of getting victims - most people in the UK are aware of what the grooming gangs are and how they operate (thanks to a series of in depth reporting from various news sources not called Tommy Robinson).
Tommy Robinson was not the catalyst for the exposure of these. Various journalists (BBC, The Times and others) exposed different scumbags over the years and also the appalling failures of the authorities to properly investigate and prosecute these scum. What Tommy Robinson has done is target the Muslim grooming gangs specifically for his own agenda. He is well aware people are outraged over the child rape scandals and has used them to gather support. He is not some great journalistic giant pursuing the truth. There is plenty being reported.
Interesting that the article you link has the Daily Mail being shown as being unfair to Tommy Robinson. The Daily Mail (like most of the UK's national press) is a right wing newspaper. So right wing that it was pro-fascist and pro-Hitler right up until it became obvious that war was coming in the summer of 39. Overall its views have not changed that much.
In the UK the right to a fair trial is considered an important thing, along with the presumption of innocence. In order to achieve this in some ongoing trials there are limits to what the press can report so that a fair trial can be achieved. Once the legal proceedings are over then the press is free to report the trial and its outcome. Tommy Robinson was well aware of the restrictions of this case and ignored them. He knew what he was doing. In due course the trial (like others before) will conclude and those judged guilty will be locked up for a long time. And they and their crimes will be reported in the press. As has happened before. Repeatedly. Essentially the right to a fair trial is considered so fundamental that we have these temporary restrictions to ensure that.
The historical failure of the authorities to stamp out the abuse at a far earlier stage is contemptible (and is not unique to Muslim paedophiles or to the UK). Sending Tommy Robinson to gaol for his actions is not.