Brexit is going to be an insignificant rounding error in comparison with COVID let's be honest. There's no comparison here as demand is massively constrained and a lot of people are sitting on a lot of money as a result of home working. Anyone who says they know what summer 21 or 22 will look like is best-guessing as that pent up demand will be released differently depending on the size of the post COVID job losses.
Brexit, which happened over a year ago now, doesn't even register by comparison.