EU rules do not stop innovation in the agriculture sector. The precautionary principle to risk management is applied around the world, just in different sectors. They do however prevent some US food being sold into the UK. (last paras of news.sky.com/story/protests…) 
If EU rules were holding back agriculture production so much how come the Netherlands has become the world's second largest exporter of agricultural produce? nationalgeographic.com/magazine/2017/…
UK policy is currently to rush into trade deals without knowing what our post-Brexit economy looks like or how trade deals will affect them. On the positive side we hear Number 10 scepticism on this, and some initiatives to start discussing them. We should play a longer game.
