Treason
The crime of betraying one's country, especially by attempting to kill or overthrow the sovereign or government.
This is in effect what Bercow and the Lib Dems are doing by offering encouragement to the EU that another referendum and remaining is an option favoured by the UK. This is undermining the elected government who are striving to get a deal which will allow us to be trading partners with our friends in Europe, and at the same time removing the federal control of the EU.
The countries of Europe need to trade to survive, lets hope common sense will prevail.