My chassis was also gracked in the same position as Roger's but on the other side (i.e. the left hand side). Mileage to date 16,140. Roger spotted the crack on my car whilst on the Goggles & Gauntlets rally.
MMC repaired mine yesterday with the same method they have used on Roger's. Their reaction was very good but unfortunately they (MMC) cannot give any sort of absolute guarantee on this repair.
Only time will tell if the repair is satisfactory or if the stress point is just moved to somewhere else.
What worries me is that when cracks first start to form they are not visible to the naked eye and have to progress some way before they can be seen easily.
All owners of up to the end of 2013 cars should check their chassis carefully.
