The Australian government’s consideration of scrapping tax breaks for housing investors has sent a jolt through the British property market, where experts are now fretting over the potential ripple effects. The Land Down Under is toying with ending negative gearing and the capital gains tax discount, policies that have fuelled a decades-long property boom. For those of us who have watched the London market gyrate like a over-caffeinated trader, the parallels are unmistakable.

Negative gearing allows investors to deduct losses from rental properties against their salary income, a sweetener that has turned ordinary Australians into amateur landlords. The capital gains discount halves the tax on profits from assets held over a year. Together, they have inflated housing prices to levels that make even Kensington look reasonable. Now, with a housing affordability crisis and a Labour government leaning left, the axe may fall.

British property analysts are watching with the nervousness of a fund manager eyeing a black swan. “If Australia pulls the trigger, it will be a live experiment in whether such tax perks actually drive investment or just inflate bubbles,” said one London estate agent, who asked to remain anonymous (presumably to avoid upsetting wealthy clients). The fear is that UK policymakers could take note. The British Treasury, ever eager to plug fiscal holes, might see an opportunity to emulate the Antipodean zeal.

The City’s sentiment is clear: capital hates uncertainty. The mere whisper of tax reform in Australia has already seen a slight uptick in inquiries from Australian expats looking to park money in London bricks and mortar. This is capital flight in its most polite form. If the changes go through, expect a flood of Aussie money seeking safe harbour in the UK, pushing up prices in already overheated postcodes like Belgravia and The Shard’s shadow.

But the broader lesson is about the fragility of property markets propped up by government subsidies. Negative gearing and similar breaks are steroids for housing: they pump up prices, distort allocation, and ultimately leave ordinary buyers on the sidelines. The inevitable correction, when it comes, is brutal. The UK’s own stamp duty holidays and Help to Buy schemes have had similar effects, turning housing into a casino rather than a home.

For now, the British market remains resilient, but the warning from Down Under is clear. Fiscal responsibility demands that we wean ourselves off such addictive incentives. Central bankers, take note: market volatility is the price of frothy policies. The bottom line is that housing should not be a tax dodge, and Australia’s potential reform could be the dose of reality that both markets need.