[ascorbic]

It's always been 999 in the UK. 112 works on phones too, but that wasn't because of the EU: it's part of the GSM standard.

[usr1106]

Both are official https://www.gov.uk/guidance/999-and-112-the-uks-national-eme...

112 was made official by EU in 1991 when GSM did not exit yet: https://en.m.wikipedia.org/wiki/112_(emergency_telephone_num...