Could someone define the meaning of GMO foods for me please? I had someone say to me that modifying crops has been done for all time, and indeed I have an apple tree that is a Golden Delicious tree to which my lovely old Scottish neighbour ( he's dead now, and much missed) grafted a Granny Smith apple and a Jonathan apple about 25 years ago. Both grafts still bearing some fruit each year. This is surely modification, as was pointed out to me by a scientific type person in my family as I was commenting on the horror of the current rat tumour story.

I must admit that to me GMO means something like adding fish DNA to tomatoes to make them (the tomatoes) glow in the dark. Obviously the truth is somewhere in the middle I hope.