High low thermometers

Thanks everyone, sounds like most people are using them as I am planning except Bren. I have never considered fitting a thermometer to my girlfriend but each to their own.

I ought to have learnt by now to check very carefully what I post using my phone it does seem to have a mind of its own 

I wouldn't give that another thought Bren, no doubt I will make the same mistakes, when I reach your age.