Right then, I thought this little gem had gone away, but that isn't the case!
The wiper problem is back, as in occasional pause. The people who did it before will be contacted in due course. However, I have now noticed that on intermittent, there is a rapid clicking on the return stroke of the wipe, only on the return, the upwards movement is fine, without any noise or hesitation, it sounds like a relay clicking on and off very quickly. It is coming from under the plastic panel where the motor sits, but seems to be coming from the middle area. Any ideas what this is? The intermittent relay in the car, as mentioned earlier, is not making this noise. Any ammunition to take back to the garage would be appreciated!