If you have a free square metre of land, may I suggest that you buy a Tayberry plant.
You only need to buy ONE, as they send out suckers by the dozen, and in a couple of years you'd have plenty.
I freeze my excess, and I also make wonderful Tayberry/Raspberry Vinegar.
Thus: Fill a bowl with however many Tayberries or Raspberries you have, cover with colourless vinegar, add as much sugar as seems reasonable, then wait a few days before straining through muslin into bottles. Wonderful on Summer salads (and for coughs).
Otherwise we eat ours with Vanilla Ice Cream.... Nice.