Russia never "fell" to communism. Al tough the Bolshevik Party's "adventure"(as the Menshevik and Right SR Parties called the October Revolution) had elements of a political coup, it was unique in that a majority of the working-class populace in the cities supported it(out of several million workers across western Russia, which was more representative of the popular will then it sounded)
The right-leaning leftist parties drew support mainly from the upper and middle classes predominately, while the Bolsheviks drew support from the working-class, whom made up the majority of the urban populace in Petrograd and Moscow.
Furthermore, a main point of Lenin's "coup"(an allegation that he was keen to deny, and even explain in great detail why it wasn't a coup to his opponents and supporters alike) was to radicalize the Petrograd Soviet and the local district soviets.
Trotsky wrote in his epic, The History of the Russian Revolution, that at the Second All-Russian Congress of Soviets, for the first time ever a Soviet Congress was made up not of suit-and-tie professional politicians, but of impoverished workers, peasants, soldiers, and sailors, whom were sent as delegates from local soviets across the west Russian provinces to Petrograd.
That was the whole entire point of the revolutionary insurrection in the streets of Petrograd on the day of the alleged coup: not to simply replace one set of leaders with a new set of leaders from a different party(in fact, Lenin showcased immense anger when he wrote following a Menshevik and Right SR walkout at the Second Soviet Congress that he wanted a coalition government of all parties of the left, to broaden the government and to allow for the people to, in theory, test out various parties and ultimately choose the party of their choice in the Constituent Assembly elections.)
Following the walkout, and before the split in the Right SR party that would forge a new, much more radical party, the Left SR party, the Bolsheviks had to govern Russia alone for a while, hampering their efforts to fix Russia's numerous problems following it's disengagement from the WWI.
Russia's communist revolution was rather popular, at least amongst the lower-classes, prior to the issues created by a variety of negative factors in 1918 plaguing the country.
As for a British Revolution, the radical course set by the revolution could only lead to one thing: a swift breakup of the former United Kingdom of England, Wales, Scotland, and Ireland, and the ultimate destruction or exile of the British monarchy.
As Mao Zedong is often quoted as saying: "Revolution is not a dinner party."
A British Revolution would be violent, merciless, an terrible. With the 'have nots' on one side, and the 'haves' on the other: all-out civil war.