When did smoking in the workplace stop uk?
Smoking in workplaces and enclosed public spaces has been illegal since 26 March 2006 in Scotland, 2 April 2007 in Wales, 30 April 2007 in Northern Ireland and 1 July 2007 in England. 
When did smoking in the workplace stop Scotland?
26 March 2006
Smoking in the United Kingdom
Smoking in workplaces and enclosed public spaces has been illegal since 26 March 2006 in Scotland, 2 April 2007 in Wales, 30 April 2007 in Northern Ireland and 1 July 2007 in England. 
When did smoking in the workplace stop Wales?
2 April 2007
Smoking in the United Kingdom
Smoking in workplaces and enclosed public spaces has been illegal since 26 March 2006 in Scotland, 2 April 2007 in Wales, 30 April 2007 in Northern Ireland and 1 July 2007 in England. 
When did smoking in the workplace stop Northern Ireland?
30 April 2007
Smoking in the United Kingdom
Smoking in workplaces and enclosed public spaces has been illegal since 26 March 2006 in Scotland, 2 April 2007 in Wales, 30 April 2007 in Northern Ireland and 1 July 2007 in England. 
When did smoking in the workplace stop England?
1 July 2007
Smoking in the United Kingdom
Smoking in the United Kingdom
https://en.wikipedia.org/wiki/Smoking%20in%20the%20United%20Kingdom
Smoking in the United Kingdom
In the United Kingdom, smoking in the workplace was banned through laws that were enacted separately in England, Wales, Scotland, and Northern Ireland. First, Scotland made smoking in the workplace illegal on 26 March 2006. Then it was made illegal in Wales on 2 April 2007, and in Northern Ireland on 30 April 2007. Smoking in the workplace in England became illegal on 1 July 2007.