Other than offering general advice on this forum, I Can't and don't claim to have had any input into this claim. I condone the approach of customer which mirrors my own thoughts on the subject, and was very glad to see the outcome for the customer.
What has always concerned me about Caravan manufacturers, is their all to ready to blame the customer for the companies own failings. We are never likely to know the root reason why Bailey caravans seemed to suffer this problem, and this is down to companies apparent inability to say sorry, and they don't want to wash their dirty linen in public because it can open the floodgates to wider ranging claims, and loss of confidence for investors.
This is also frustrated by UK consumer rights focusing on the purchasing contract, which decouples the manufacture from the end user. There is a possibility that a "Class Action" cold be raised against the caravan manufacturer, but these are extremely complicated, it requires the cooperation of several complainants, and they cost a lot. The other possible option would be a "super complaint" which only a few organisations are permitted to do - the" Consumers Association" publishers of Which? magazine are one, but these actions are generally against an industry sector for example Telecoms, Trains, Energy or Water companies, rather than one company (unless they're a monopoly).
I would love to see an addition to the CRA two further stages where the customers interests are considered equally to a businesses commercial interests.
If a substantive proportion of a product has a history of common failures, these could trigger a formal arbitration hearing in front of a jury, where the manufacturer would be required to explain why the fault has arisen and what they have or intend to do about it. The jury would consider if the companies explanation and actions were reasonable, and if not, they instruct the company to take further action to reduce to a prescribed percentage failure rate future recurrences of the fault, with a time schedule for its implementation, and verification.
The company should also put int place a package for past, current and any future end users whose claims for this particular fault were frustrated or rejected by the manufacturer. A company failing to comply with the jury's ruling could be taken to court for a judicial review .
This process should also be open to commercial organisations who are middlemen in the supply chain before the retail customer.
These are only first thoughts on the subject, and I'm sure there will be others who have points to make.