I put it down as 'one of those inexplicable things' put the clock right and got on with things. So imagine my surprise on Friday morning (yesterday) when the clock was again very fast. Again I put it right. When The Family came down for dinner last night Wendy and Martin mentioned that their clock had been 30 minutes fast yesterday morning and caused some surprise. Both our clocks were fast again this morning.
The common factor with the fast clocks is that they are run off mains electricity. All the other clocks were ok.
The utility company are replacing the main supply boxes at the moment and we are both on a temporary lorry-mounted generator. Now I would have expected the utility company to ensure that the current supplied by the generator is exactly the same as the usual mains supply.
In any case I'm not sure how an alteration in current would make the clock run fast without causing damage to other electrical appliances.
Can anyone explain?