But there is no fair way surely then noblegiraffe?
The proposed solution is certainly not fair on the current Year 11s who have worked on this task studiously and without accessing any cheat sites at all. Children who may well now be penalised - they've spent hours of work on these tasks - preparing for it, and then actually doing the 20 hours. Time that, had it no longer counted, could have been condensed and the there side focused on more. And to take out a practical component from such a practical subject is incredibly damaging - not just to the children studying for it and who have chosen it for that reason, but also to the subject as a whole.
And part of this is the exam boards own doing. They could have foretold such a problem and but things in place way before now. A much bigger investigations needed. On those websites there will be a lot of information - firstly, is it all of the different tasks on there, for all of the exam boards? If not, which ones? If all, then how many unique access codes were actually made? The number accessed, though seemed high is most likely many repeated visits to start with - that could well, half, third, quarter the number. How many of those unique IDs can be traced? and where too? Then through moderation of the coding component - are the solutions exactly the same? Because with these tasks there are several ways to solve them.
Surely there has to be some comeback on the exam boards on this, fr more so on the students - the great majority of which who will have done this work without cheating.