I think Jonathan has some pretty valid points. The UK has an obsession with home ownership which is not reflected in many other countries. However it has rewarded people who invested in their homes as asset inflation pushed prices higher while easier monetary policy kept borrowing rates low and lowered the cost of the leverage.
The problem is that it is easy to get complacent about the risk associated with property. In the early 90's it was possible to buy a three bedroom flat in Islington for £135,000. At the time, the mortgage rate was around 7% (with a bank base rate of 6%) and the rent would have been about 10% of the house value per year. At the time it would not have seemed the no brainer that it appears now with 20:20 hind sight. In September 92 Interest rates went from 10% up to 15% then back to 12% in a
single day and the memories of this were still clear in people's minds. The price of property reflected the price of borrowing money to buy the house compared to renting it with a risk adjustment for the borrowing rates going higher.
Jump forward 20ish years and that same flat is worth about £800,000, the rental yield is about 3.5% and a buy to let mortgage on the flat would probably be around 3% although depending on an individual's situation it could be considerably more expensive or, in fact, cheaper. Economically not a massively different proposition from the early 90s with a rental yield that is slightly higher than the borrowing rate.
Anybody that has invested in property in the last 20 years with a mortgage has taken a large, leveraged, investment in interest rates which has massively paid off. They have taken that benefit free of any income or capital gains tax (buy to let investors excluded). I'm not saying this is a bad thing, I'm just pointing out the facts.
We have not had a rate move in the UK since 2009 and the last rate hike was in 2007. The interest rate market is still pretty complacent about rate hikes and if rates are not moving forever then owning rather than renting makes sense. However if interests rates return to anything like the levels they were between 1995 and 2005, then property has to either pretty significantly drop in price or rents have to massively increase way above inflation.
I would question that the risk/reward for buying a property with a large mortgage at the moment.
As for foreign ownership, I don't have a massive problem with overseas investors in the UK seeing opportunities that are not relevant to me (if they fear a depreciation of their own currency for example). This may seem like a bad thing if you are on the side watching property prices increase and wish you could afford to buy, but it may be a lifeline in liquidity when the market turns and buyers are not so easy to find.