Well that's a relief. The problem with the oven was really quite minor and the engineer fixed it very quickly. The electrician, it appears, had failed to tighten the screws which held the terminals into the power supply in the wall. It could only be solved by removing the unit, so was not something the Gorse Fox could have sorted himself. The chap did have a very useful appliance. It was a stand, on wheels, with a screw jack that allowed a table-like surface to be raised or lowered. This was raised to the level of the oven and the oven was simply pulled out onto the appliance and oven out the way. Simple, and a single person job.