There was a brief, and useful, exchange about over thermometers here the
other day, and I'm going to get another oven thermometer to 'calibrate'
our present one.

If, as we have always suspected, our oven (gas btw) is not reaching the
correct temperatures, are there any adjustments that I could make, to
get it to put out more heat? (apart, obviously, from turning it to Gas
Mark 7 when we want Mark 4, for example)

Cheers
John