This is worth a quick read. It is to the point and well written.

http://www.newstatesman.com/society/2010/10/land-tax-labour-britain

“It will be said that in a world of internationally mobile capital and people it is counterproductive to tax personal income and corporate profit to uncompetitive levels. That is right. But a progressive alternative is to shift the tax base to property, and land, which cannot run away, [and] represents in Britain an extreme concentration of wealth.”
Vince Cable, Liberal Democrat conference, Liverpool, 22 September 2010