My mention of mixing a tin of grapefruit with a tin of cheats ready prepared marmalade mix had lots of people asking for more details.
Here is the recipe from the book W.I Jams,Pickles and Chutneys
It works and tastes delicious.
As Pat says in comments - people on statins shouldn't eat grapefruit and it does have a HUGE amount of sugar in it. I've put the recipe on my recipe page with more details.
Welcome to some more followers, hope you enjoy reading.