I can't tell you about nursing in Sheffield, only my experince as a visitor to the Hallamshire and Childrens Hospital.
( I presume you mean Sheffield South Yorkshire not Penzance Cornwall?)
Sheffield is a great city, lots of nice shops and is near to MeadowHall (a big shopping complex. It has lots of concerts and is a lot larger than the surrounding towns. It used to be a steel based industry but is now more buisness based, and is a thriving city in South Yorkshire.
And as it is up north, you are likely to get a warm welcome, I practically grew up in the childrens hospital visiting my sister and I have fond memories of the city.
I can't think of anything else specific, but here are some website links:
(local radio station)
Hope that helps