which part of the NHS is responsible for decisions on the design of nurses' uniforms. 

Following a public consultation in 2008 the design of the NHSScotland national uniform was determined in partnership with NHSScotland boards, professional bodies, trade unions, staff focus groups and the Scottish Government. All boards are required to comply with the National Uniform Policy issued in December 2010 when providing staff with their appropriate national uniform. The National Uniform Policy is available at:
http://www.sehd.scot.nhs.uk/mels/CEL2010_42.pdf.