"Well we haven't left yet? "
We are. Its happening right under everyones noses, and is being ignored. Business make trade, not governments. You think the likes of EY, employ 4000 staff this year, whilst sitting there thinking, well we may lay them off next year? Absolutely not.
There are (contrary to remainer opinion) some quite clever people out there doing fantastic business in all sectors of all markets. They had contingency and buisness plans in place within days of the referendum vote. Not one, even the tiniest supplier, is sitting at home, waiting for David Davis.
The impact of brexit, is just the same as a currency fluctuation issue, or a new reg from Brussels issue. Willie Walsh (aircraft) chuckles at the hysteria surrounding the 'planes grounded' claims. If you followed the CBI this week, they are absolutely far more concerned about Corbyn, than they are Brexit.
Not only is the world still turning, the UK are cracking on, to the point that come 'Brexit' day, you wont even notice. Its happening now, not March 2019.