In the same mail he said:
"The government will only achieve the best for the country if it harnesses the best experience we have - a large proportion of which is concentrated in UKREP - and negotiates resolutely. Senior ministers, who will decide on our positions, issue by issue, also need from you detailed, unvarnished - even where this is uncomfortable - and nuanced understanding of the views, interests and incentives of the other 27. Serious multilateral negotiating experience is in short supply in Whitehall, and that is not the case in the Commission or in the Council."
"Contrary to the beliefs of some, free trade does not just happen when it is not thwarted by authorities: increasing market access to other markets and consumer choice in our own, depends on the deals, multilateral, plurilateral and bilateral that we strike, and the terms that we agree."
and finally,
"Have you seen the fucking state of The Wolves Forum Referendum thread? Jesus! What a bunch of twats."