The Ciompi revolt started in Florence in June 1378 and the Peasants' Revolt started in England in May 1381, just three years later.
Did the news about Ciompi Revolt reach England in three years?
Did the ruling class in England gain some advantages over the rebels due to a previous knowledge about the Ciompi Revolt?
And what about the rebels? Did they know something about their Florentine mates (I would say "comrades")?
Research (from OP's comment):
I had a look at wikipedia page for Peasants' Revolt and searched for the word "Ciompi" with no result. I was thinking that Simon Sudbury (the Archbishop of Canterbury during the Peasants' Revolt) could know something since he was member of the Catholic Church.