Took the van to YC Leisure today for them to look at the leak and they agreed to keep it until they can squeeze it in to be fixed.
Credit to them as I think they had plenty of work on and could have asked me to wait.
The chap I was talking to said that yes it was a common problem and one that is recognised by Bailey who have produced an upgraded part to fix it that has a serrated surface which the sealant grips better than the original one but obviously Bailey are waiting until leaks occur rather than issuing a recall,very helpful.
In a way I am glad it occurred as it did as at least it was a smallish leak that will now be fixed,hopefully properly,which is better than a deluge of water coming through the roof in the middle of the night and soaking everything.
Thet have also agreed to put in a warranty claim for the faulty panel dis[play showing "8".
Just got to wait for it to come back now.