the government of wales act 1998 set up the welsh assembly but gave it no more powers than the secretary of state for wales
the govt of wales act 2006 allowed that wales be given primary legislative powers if approved by a referendum and eventually set up an executive.
the 2011 referendum saw 64% in favour of giving wales primary powers over its existing 20 relevant areas
the senedd and elections act 2020 formally changed the name to SeneddCymru and gave the vote to 16/17 year olds
the scotland act 1998 gave the scottish parliament primery leg powers surrounding health, education and limited control over income tax
the scotland act 2016 allowed authority over areas like equal opportunity and abortion law as well as full control over income tax rates and voting age
Local Government Act 2000 - any local council can hold a referendum for an elected mayor. Since then the referendum is no longer necessary.
Scotland Act 1998 - Scotland has its own executive and primary legislative powers in relevant areas including limited power on taxes with the introduction of the Scottish Variable Rate
Scotland Act 2012 - introduction of Revenue Scotland tax authority and the Scottish Rate of Income Tax
Scotland Act 2016 - can create income tax rates across any number of bands. Increased power over other areas like equality of opportunity, abortion and who can vote, leading to franchise for 16 and 17 year olds.
The 2016 Scotland Act came as a result of promises made by Cameron in the run up to the independence referendum.
Government of Wales Act 1998 - only gave the new Welsh Assembly secondary legislative powers in relevant areas equivalent to that of the Wales minsiter.
Government of Wales Act 2006 - established an executive and allowed that primary legislative powers be devolved if they were supported by a positive referendum vote.
The 2011 referendum saw 64% of voters who turned out in favour of primary legislative powers for the Welsh Assembly in 20 relevant areas.
The Wales Acts 2014 and 2017 increased policy areas with the second involving the first tax raising powers given.
The 2020 Senedd and Elections Act gave the vote to 16 and 17 year olds
Northern Ireland had a parliament before 1972 but it was abolished as it was biased towards nationalists.
The Good Friday Agreement 1998, voted for by 71% restored devolution on the condition of a shared executive, and also restored peace by releasing prisoners and creating more links between Ireland and the UK
There are 129 MSP seats in Holyrood. There is currently a minority SNP government led by John Swinney after Humza Yousaf ended the co-operation agreement with the Scottish Green Party.
There are 60 AM seats in the Senedd. Labour, led by Vaughan Gething, the first black leader of any European country, have a majority. He faced a vote of no confidence within the first three months of his premiership.
There are 90 MLA seats in Stormont. It is currently led by Michelle O'Neill of Sinn Feinn and deputy Emma Little-Pergelly of the DUP