DB thawed the outside freezer yesterday. Sorting through the myriad bags of fruit, we came across some from 2019 and let them thaw. One was a bag of blackberries, the pips from which we are not too keen on after thawing. They were stewed and pushed through a sieve.
Having weighed the rest of the fruit, plus the blackberry juice, they were put into a preserving pan ready to make jam: