It's just too easy sometimes. From the Independent's Paperchase e-newsletter:
Blackcurrants, wild salmon, eels, cod...all could disappear from the traditional British dinner table/caff/beach kiosk by the close of the century.There they were and then they weren't. Or they'd morphed into a different fruit. Unless, of course, the formula for Ribena's changed.
[...]
Blackberries. The pharmaceutical company GlaxoSmithKline, owner of the popular cordial Ribena, has become so worried by the effect of global warming on British blackberry farms that it has asked scientists to cross-breed hardier varieties designed to thrive in increasingly mild winters.