"Different to" (as oppsoed to from) is pretty much uniform usage in Britain these days. Its usage in written English could almost be described as becoming archaic. Indeed it already was back in the 70s when our school teacher told us only "from" was acceptable. And indeed in those days "from" was common, almost universal usage, in all carefully written texts, because everyone else had been told the same at school, even if they never used it in speech, except when they were thinking very carefully about it.
Our teachers tried to tell us that "to" was modern abuse. I researched this recently, and I believe there is no evidence that there ever was a time when "from" was used to the exclusion of "to" in British English. I was reading an Anthony Trollope novel from the 1860s recently, and he used to and from interchangeably. So he didn't feel constrained by what school teachers were teaching, maybe only at a later date.
You do come across "different than" in Britain too. Even the style guides recommend it as a contraction of "to/from what", eg "I did something different than he did."