Thanks Dazzler,
Trailer has had significant water ingress through roof seal. The second time it went back i told the company the roof had a dip in it and a gap under the seal. It came back, dip was still there and it leaked again. it has gone back again, they have had it 2 months now, apparently the roof has been straightened, but they are not telling me how, despite asking several times. They asked me to come down to inspect it, but i cannot find the time (its 700km one way). They say they have tested it and it doesn't leak. Department have inspected it and say it appears to have been repaired professionally. Many emails have been exchanged with the last one the company stating they will return it, but as they have not had the chance to take it out in the rain to do all possible checks that if we want it returned, then if any future leaks the trailer will need to be returned at our expense. They haven't said they won't repair any future leaks, just won't pay transport costs. Been a frustrating 14 months.