To be fair it's getting on abit. Everything encounters problems eventually. I was on 7581 today and that thing was rattling, buzzing the lot and that's only 2 years old. Same with some of Temsas, I imagine all of them have had some sort of problem. Some maybe small, some maybe big, but most of them still are going on and operating just fine. 1421, when or if it returns to Redcar needs to be put on a easier route such as the 62, 63 or 81 if it's having major problems.