The Limp Dems and Labour are currently planning a mansion tax and are threatening during this Parliament collaborate to achieve this where by working together they have enough MPs to pass this legislation though the commons.
What this is be beginning of the nationalisation of ALL property. Once the principle of a mansion tax with a £2m threshold has been established then the threshold will be progressively lowered where Governments cannot raise enough money, hence the current deficit, from other taxes.

Nick Clegg said today on his radio program, that those who could not afford the tax, like asset rich, income poor widows would have the choice of either selling their house or the Government owning the tax percentage each year. Now say the tax was set at 5% and the widow opted for the Government taking a slice each year. Now due to the compound rate of the Government's accumulation they would have nationalized and own the property in less than 15 years. Now if the Government charged 5% and dropped the threshold to say £200,000 so it mainly affected the 'rich' South East, how would you feel about having to pay £10,000 or more per year on income that has already been taxed or have your house nationalized in less than 15 years, so you then have to rent?

This is what this monstrous tax on capital you have accumulated from taxed income would do. IMHO outrageous. The Limp Dems are already talking about extending it to jewellery, savings and other assets in consultative papers, so this could fairly quickly could end up as a net worth tax.

I have warned in previous post that desperate broke Governments will do anything to keep the plates spinning and their snouts in the trough for a bit longer and part of this will be to confiscate all personal wealth, well this will be the start.
http://www.telegraph.co.uk/news/politics/9883344/Nick-Clegg-Elderly-should-sell-homes-or-pay-mansion-tax.htmlAnd those of you that scoff at this, this is exactly what has happened in Italy with their current hated property tax, introduced by that imposed EU stooge Mario Monti. Berlusconi has pledged to abolish this in his current election manifesto which has improved his ratings from no hoper to outside contender.