The pattern for the Stickies and Vanguard is quite interesting. As for the Unionist split, Candidates? (Also The highest bracket in the "UUP - Anti-White paper" map reads like 80 to me, surely 30?)
I would argue this:
I would argue that the ILP (to keep it simple) was 'socialist' at least from its founding in iirc 1911 to the mid 1920s. Look at its role during the lockout and the Strikes of the early 1910s. It was actually then one of the more left wing parties in Western Europe in its very early period.
