What will Brexit mean for the environment?

This week I've been able to talk to Martin Baxter, Chief Policy Advisor at IEMA. We have come a long way from "Brexit means Brexit, a red white and blue Brexit". This week Mrs May set out 12 points which would be the foundation of her negotiating strategy. It's clear that her intention is for the United Kingdom to leave the customs union and no longer to be a member of the European single market although she expects us to continue to enjoy full access to it. Whatever happens, there will be implications for all aspects of daily life and commercial activity in the UK. Red tape is one thing, but protecting consumers and businesses is something else. So how will regulations change? In particular, how will environmental regulations and standards survive the U.K.'s departure from the EU?