They had their referendum in June 2016. At that time there was some question as to how it would turn out. Then the United Kingdom needed to decide what they wanted to do after they got the result they ended up with.
Like any negotiation, it takes two willing partners. They had not had the competency to negotiate free trade agreements at that point. It does take a little bit of time to develop that expertise, move some resources around and prioritize that.
It took some time for that. I think they clearly recognized the benefit of maintaining trade relations with Canada in some way, shape or form. That's why, in 2017, former prime minister May and Prime Minister Trudeau decided there was some scope for us to explore how we could maintain the trade relationship and make sure that whenever they did officially get to Brexit we would have something in place to mitigate what would happen at that time.