Very probably.ASB. The King and Lords knows that will sell about as well as 3-month old pork, and you'd see nothing resembling a civil war but rather a brief political crisis, followed by the Army backing Parliament. That kind of blatant overreach doesn't fly outside of SEVERE crisis situations.
Well the Conservatives offered basically total support for the UVF with Bonar Law (party leader) reviewing the proto-volunteers on 09APR1912. Henry Wilson, amongst others, also supported them. Overall the Conservative party supported the Unionists and UVF even when they were engaged in sedition, treasonous conspiracy and outright rebellion.Also likely no civil war in this case... though I imagine the Tories would just see a few of their ringleaders arrested. "Rounding Up" every Conservative is insane, considering they make up roughly half the country, and a Conservative party will continue to exist in some form regardless of the immediate scandal. Its basically rule one of political science: there will always be a conservative party, if only to represent people's natural risk-aversion and inertia.
Really the "Plot against Ulster" was more overblown hysteria and Unionis conspiracy theory than reality.Of course, its just as likely news leaks about the Asquith shadow cabinet's planned "Plot Against Ulster" for extra-judicial use of the military. Again, political scandal far more likely than actual civil war.
Well if Labour gets (say) 20% of the vote nationally having stood far more candidates (historically they had 56 standing in the DEC1910 election with 42 elected) the probably wouldn't have won any more seats (they carefully targeted their constituencies) and this could have contributed to a degree of unrest.A Communist uprising/General Strike is certainly a viable option, perhaps if Labour gets alot more popular and is shuttled out of government. Maybe the result of the protective tariff issue coming to the forefront and creating a split between the Free-Trade liberals and Pro-British Worker labour?
I'm rather fond of Sidney Street as a potential spark for a revolution myself. Perhaps if the populace were more embittered, more hostile to the police and more sympathetic to the anarchists it could have developed differently. Now this happened before the first 1910 election while the Labour Party was still a new force in politics.
Given that Churchill was Home Secretary there's plenty of potential for overreaction on his part.