Where Parliamentary boundaries overlap a ward the polling district boundary is shown as
a narrow line (eg Hillsborough) or a hollow line
Polling district boundaries and electorates are a combination of the City Council's
work from 2004 drawing the original boundaries and my work in 2012/2013 updating them,
Colour maps are covered by Sheffield City Council's license from Ordnance Survey,
their use under Fair Dealing is allowed "for private or research study purposes,
These maps may be reused for appropriate purposes.