Simple.

It really was simple.   Mrs May had a mandate for the UK to leave the EU.  

She also knew what people had voted for because Cameron, Brown, Clegg and Osborne told us when we were voting what exactly we were voting for.  They told us if we voted Leave we would leave the single market, the customs union, the rule of the ECJ.   

So if Remainers were telling us that, we knew that is exactly what was being voted for.   Yet Mrs May contrived to lose it all and surrender all to the EU.   

Any new leader needs to go back to the mandate the people gave parliament.   

Leave does indeed mean leave.