One key outcome of Brexit that must form a Red Line for the UK is the reclaim of our exclusive economic zone from the EU. Do not take this for granted; they don't want to give it up, and no wonder. There will be a fight over this, but in the over-riding national interest we must be implacable. No deals, no shared sovereignty - we'll have the lot back from 2019.
A glance at the bathymetric map will reveal our advantage. French and Spanish EEZs also extend to 200 miles - but mostly over deep waters. Ours are almost wholly over the rich, fecund, warm continental shelf on which sea life thrives - if not overfished. Britain's fish resources are the richest in Europe, and currently belong to the EU.
This is also a key reason to form a close and mutually beneficial alliance with Norway; also outside the EU; between us we own 70% of Europe's fish. Denmark, NL, Belgium, Germany and France all have inconsequential fishing waters.
Make no mistake, we will have our waters back, no exceptions, no qualifications. And we alone will decide who may fish those waters and how much may be taken. A robust conservation policy coupled with determined and aggressive enforcement will restore these seas to a marine resource teeming with life. One thing is clear - Europe will pay far more dearly for its fish in the future than now.