Given that only a few years ago, you could only raise 3.5 times your own income and twice your partners income as security for a mortgage, well things have changed.
The previous generally related to a historically high interest rate world, and for the last 10 years or so we have had a relatively low interest rate.
This meant that repayments per £1 as a percentage were so much lower, but all that meant was that more money was chasing the same number of real estate.
Its worse than that, because financial insitutions started to lend money on higher income multipliers, the worst I heard of was 7 time annual income - though that was for a newly quyalified nurse whose true income will rise quite swiftly.
Loans of around 5 times income, and 5 times spousal income became much more widespread, but again, its just more money chasing the same houses.
Result, hardly surprisingly is that house prices have exploded, but in a low inflation and low interest rate world, pay rises are also low, and this means a big loan stays big for a longer time as inflation does not erode it so quickly.
House prices in the UK are at a minimum of 30% above realistic value, actually that rubbish, simple terrace houses in Leeds are on the market for £120k, but the reality is that in terms of repayable income, they are actually worth perhaps £50k and that is being generous.
This means that has to be a significant cahnge in relative values, either house prices fall dramtically or they stay where they are for a long time, or inflation cuts and devalues everything.