Create new targets to be achieved over a 5 year span of time, to lead the UK to increase its self suitability, and rely less on imports from other nations. In terms of agriculture, energy, medicines etc. Also work to increase the science and engineering sectors of this nation.
You may be interested in these active petitions
Brexit has lead us to see that without a deal we will struggle, with increasing prices, and so by increasing our own suitability, we would be able to tackle many issues. By promoting our science and engineering sectors we could become far more sustainable as well as increase our own exports to back up the economy.