In reply to Neil Williams:
I did my PhD in Plymouth - and I had a brilliant time. There is lots of good climbing in the area, ranging from Torbay (Limestone - trad and sport), Dartmoor (trad granite outcrops - a bit like grit really), North Devon (ranging from the sublime to the esoteric, with some big trad leads) through to Cornwall (sea cliff heaven). You can probably climb as hard in the SW as you can in Sheffield, with probably more variety of rock types.
Additionally there is great mountain biking and running both on the coast and inland on Dartmoor, there is sailing in Plymouth Sound, and beach activities (including some good surfing and kiteboarding ) in the area - the closest surf is Bantham / bigbury, Mothercombe and Whitsands.
Additionally, the night life in Plymouth wasn't bad when I was there
Steve