Seedless, I can't claim to have made any chutney for 30 years, but Jam is no problem. Halve your fruit and remove the stones and wrap them in muslin (or I use one of those little nets that comes with washing machine tablets). Layer the fruit with sugar in a deep bowl, cover and leave overnight. This way, most of the sugar dissolves before you start heating it.
Boil up the following day, with the stones. When it reaches setting point, take off the heat and allow to cool for 10 to 15 minutes before jarring in heated and sterilised jars. It should easily keep for a couple of years in a cool and dark place. In fact, it is probably better left for several months before eating, so Christmas presents should be ideal.
plum jam is really easy and lovely. will keep for a year. I made loads this year over two days and am now all plummed out - suggest you get a big saucepan if you're going to make a lot rather than (like me) juggling 3 pans at a time.
also if you stone the fruit and bag it you can freeze and make crumbles etc which is nice in winter. or stew the plums with a little vanilla and sugar and it becomes a great sauce for ice cream (also freezable).
Seedless, you can add other fruit, but just be aware that plums are very high in pectin, and the fruit you add may not be so high. You might need to use Jam sugar or preserving sugar (or Certo) just to boost it a little, although apples would be OK.
Do have a go at the jam, it really is easy. Also, Delia has a recipe for a delicious Dowerhouse chutney which uses plums. It's in her Complete Cookery Course book if you have it (or know someone who does) mine has gone walkabout ...
Thanks all - you've certainly given me food for thought (oh God, what a bad pun!).
I think I shall put aside part of next weekend (after carpet removal, floor-sanding, tip visiting, wardrobe dismantling and the usual less demanding domestic chores!) to de-plum the tree and start jam and chutney making. Oooh what fun!!
I shall bear all your ideas in mind as well as referring to Delia, Hugh, Jamie, Sophie, Margaret, Nigella et al...... how can one person have so many cookbooks, some of which are so old that Fanny Craddock must have read them!!