I don't know if these are available in the UK, but they can do wonders in many cases.
http://www.poweroveryourpain.com/sb/all_...CFQZeswodHkJqYw

At least all of your verti... verta.... ah... those blocky bits are all square. One of mine is more like a triangle. The stress on the back muscles trying to keep everything in line can be painful at times.

Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python