17 Jul 2017 --- Britain is unprepared for the most complex ever change to its food system, which will be required before Brexit, according to a new briefing paper published by the Science Policy Research Unit (SPRU) at the University of Sussex. Severe problems with the UK food system are likely unless issues are addressed, it warns. And the retail industry is predicting price rises of up to 22 per cent in imported goods, if Britain opts for a “hard Brexit”.