Thanks Robbity, cheese and apple after my meal sounds like a plan, but I will definitely check levels at intervals too. It's weird I'm not craving bread, pasta, biscuits but an apple?!
Re checking levels I am experiencing a bit of a problem as I discovered my meter is giving higher readings than I actually have - after a trip to a and e earlier this week I discovered my meter was reading 2.5 higher than the nurses calibrated meter (and still 1.5 higher than proper blood sample test). So, this is making my management a bit more difficult! Sheesh!