Bailey Unicorn Cadiz

I have a Bailey Unicorn Cadiz which I bought new in April 2016. I was away in it from 5/7/2020 until 12/7/2020 at one of our club sites. My wife opened the top nearside cupboard nearest to the toilet and found water had leaked in through the roof joint into the locker. Fortunately we keep our belongings in plastic boxes in these lockers so the water had collected in that. Not a lot but enough to fill the box approximately six millimetres. This has happened over a period of three months during lock down whilst the caravan was in storage. I am currently in the process of negotiating with Bailey to have the leak repaired under warranty. I do not expect to have any problems with them. Whilst talking to another Bailey Unicorn owner on site he too had suffered the same problem. has anyone else had this occur to them?