Since which year have powers been devolved from central government to Wales, Scotland and Northern Ireland?
1997.
1997 marks the start of the devolution process, though the actual Welsh Assembly and Scottish Parliament didn't begin sitting until 1999, two years later.
Test Trap. devolution began in 1997, but the Scottish Parliament and Welsh Assembly didn't actually start sitting until 1999.
Why it matters: Distinguishes the start of the devolution process (1997) from when the devolved bodies actually began operating (1999).
Memory hook: 1997: devolution begins; 1999: the bodies start sitting.
Official handbook: Chapter 5, section 5.6, page 87