“This will be a long-term task ... We agreed earlier this month that I would leave in January and pass on to others the baton of managing our future relations with the EU,” he said, noting that now it would be more correct for him to write a statement of leaving resignation with immediate effect.
Frost noted that for two and a half years he led the process of Britain's exit from the European Union.
Brexit is now safe, he said, and the authorities need to realize the opportunities it provides.
In turn, Johnson thanked Frost for serving in the government.