Given the vast array of expert (I know, I know) opinion that sterling will tank, the economy will shrink, prices will rise in the event of a hard Brexit, these companies wouldn't have to worry about 'the uncertainties' of Brexit, as they won't exist post Brexit.
I won't stand by and listen to blame shifting.
These companies are going under due to Brexit, which, contrary to being the 'easiest deal ever', transpires to be difficult and of necessity, drawn out. Rather obviously.
And why haven't we left? Because now the homework has been done, that which should have been done prior to offering a simplistic referendum on a complex, multifaceted issue (thus highly likely, not going there....) many in government realise Brexiting is a hugely damaging act of financial, political and social suicide.
And they want to step back from that cliff edge.
It was always going to be like this, and thus it has come to pass.
Voting Leave has caused this to happen.