Very confused by your comments. Please can I ask you to explain.
Do you think OP on their £200000 household income can't afford ANY house?
And you also think it is more financially prudent as a higher earner to buy a house at the top end of affordability with minimal deposit and pay interest on it for 35 years, and pay many many hundreds of thousands in interest Vs pay a tiny amount of interest and retain the money not lost to interest by buying smaller first and stepping up?
My husband and I are waiting for the housing market to stagnate further. Houses have already dipped by £47000 in real terms compared to their peak when you account for inflation.
https://www.telegraph.co.uk/business/2026/08/30/houses-in-england-worth-less-than-they-were-20-years-ago/
When we see the right movement in the gilt markets or people need to sell in distress from job loss/the next financial crash, we'll be cash buyers and can offer them a nice easy (read reduced offer) way out. The magic base rate fairy isn't coming, mortgage interest rates have returned to historic norms. The low rates after 2008 were a blip and unlikely to return in the future. Liz Truss accelerated the return but it was coming regardless.
In a high interest high house cost economy, there is downward pressure on housing price (currently through stagflation- house prices aren't keeping pace with inflation). In this economy and especially if there is an economic shock on the way, cash is king and those with very high equity or cash buyers will find it very easy to move Vs those with low equity to have to take on absurd amounts of high interest debt that they simply cannot afford.
We bought our first house 1 year before the OP and were mortgage free age 38, and by the age of 41-42 we will be earning less than the OP's household but in an £850000-£950000 house /retiring early/paying kids uni fees and house deposits because of.... Wait for it...... Financial prudence.