Launched in 2010, 3RD HOME - a reciprocal travel club for luxury second homeowners - now hosts a £3.2 billion portfolio of properties in some of the world's most exclusive locations. 

Rather than benefit the working majority, a mansion tax could, in fact, do the opposite, says Tony Hennessey... Imagine for a moment that it is June 2015.

A 27-year-old from China has reportedly shelled out over £25m for a mansion with views of Sydney Harbour Bridge. It's expected to be confirmed as the second biggest resi sale in Australian history.