On 28/04/2013 08:57, Dave West wrote:
Outside our garden fence is a Viburnam Tinus shrub about six feet high.

It has recently had a 7cm wide strip of bark bark neatly removed all the way
around the stem about six centimetres from the ground.

I'm guessing that it will now die and nothing can be done to save it?

In the ground where its planted there are squirrels and foxes running
around. Are these the most likely culprits?

I would think Mice, I've had a few young trees hit like that.
Your only chance is to try Bridge-grafting
http://www.hort.uconn.edu/ipm/homegrnd/htms/28graft.htm
David @ a dull end of Swansea Bay