Some of you may remember I mentioned some time ago about my wife's granny leaving a hand written cookbook, it was around the time of the 1st World War.

We've got her relatives up and my wife decided to make an apricot flan from the book but the oven temperature is in letters " ... in the oven for 30 minutes at E" Other recipes have other letters but no indication of what they mean in real temperatures.

I've tried Google, it's not my friend!

Does anyone have any idea where I can get a conversion chart going back so far?