If Ryanair are going to tell people who have got others to assist with their travel arrangements, like travel agents, that the booking are now void, even though the requested fare has been paid, and Ryanair are pocketing the money but refusing them travel, on the basis of some minor point in their self-written terms and conditions, then they are pretty certainly breaching the UK Unfair Contract Terms Act.
If those passengers bought tickets in the UK and are travelling from the UK, then the CAA are quite within their legal rights to act and shut Ryanair operations down from UK airports until they comply with UK law.
When will the CAA, in particular their Consumer Protection Group, stop going to work each day just to shuffle papers on their way to their MBE and their gold-plated public service pension, and start doing the job they are paid for and stamp out those who take such gross liberties with the law.