So looking around, the proportions can be as high a 2 strawberries : 1 redcurrants.
Fruit to sugar ration should be 1:1 traditionally.
Redcurrants have a higher pectin than strawberries, but probably safest to add the juice of a lemon as well (for 1-1.5kg fruit, see below).
1.2kg fruit will make about 3lbs jam.
Method1. Place the sugar in a
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