'Let trainer form influence your betting and you'll end up in a cardboard box'

It is said that when you're hot, you're hot, but if you're a trainer enjoying a sizzling run of form, how do you explain the heat?

To those on the outside looking in, it can be hard to fathom why a yard that for a period of time has been performing to its normal level of form suddenly begins to send out winners left, right and centre. To those on the inside the change of fortune is often every bit as unfathomable.

It can obviously be easier to explain why someone's name might appear in the Racing Post's list of cold trainers. The horses in a string might be extremely poor; there could be some sort of illness affecting the horses' performances; alternatively, and accepting that in any profession there will be a wide range of abilities, a given trainer may simply be very ordinary at the job.