Tom Anderson wrote:

Hang on, hang on, it now seems like that *really is* what's happening:

My gut said 'hang on, isn't that what Roger Ford was talking about with
the Southern electricity supply upgrade' - the average gap between
heatings isn't sufficient to dissipate the heat produced. The net
heating doesn't have to be large, as long as it's positive, and Father
Time will do the rest.

Tom