Things came to a crisis point when we recently ran out of the 2008 supply of homemade jam. As we used the last drop, with no sign of our own glut, something had to be done. So we went to Garson's pick your own farm, in Esher, Surrey. What a find! There are as many as 40 crops you can pick throughout the year, depending on season. They have popular crops such as strawberries in succession, so you can pick them more or less any time from spring to autumn.
It could be that the jam is made with fresh and ripe fruit, usually on the same day as picking?
It could be the dash of balsamic vinegar that Nigella recommended?
It could be the gooey lumpiness which it has, rather than the pert jelliness of shop bought jam?
Whatever it is, it makes it well worth the hours of picking, preparing, cooking and putting into jars. I am so looking forward to that first batch of scones with cream and jam.