ambassador, david o'sullivan. i asked him in the wake of the brexit how trade agreements could shift between the u.k. and e.u. >> well, everything will depend on the, what the u.k. itself proposed -- proposes as the relationship between the u.k. and the union, which it will have left of the there are a number of models the. the european economic area in which participate norway, iceland rnled leicht instein, effectively full members of the single market as u.k. is now but this carries with this con comityant responsibilities to tribute to the persons within the area. since these were controversial issues in the u.k. referendum we don't know if these would be acceptable to the united kingdom. another model is switzerland erlands, a answer -- series of bi lateral agreements that give them access to certain aspektd of the single market but they also have to contribute to the budget and accept free movement. the final could be a model such as canada ar -- or anyone else, which would require the negotiation of a free t