There is a bit of a sting in the tail with the Hornby Class 31, since a fair few of them have suffered from flawed mazak underframe casting, which either leads to fracturing of the ends of the casting or expansion, causing the plastic body to distort and then shatter in the area of the cab front. Do keep an eye on this. The same type of thing notoriously affected the Heljan Class 47 which, not content with being too wide, then became too long.