Early 2000's. Civil servant. Had saved the deposit by saving small amounts from all earnings from PT jobs in school/uni/summers and two years living in a tiny tiny room in a shared house.
Bought a very run down (no functional bathroom run down) flat in an undesirable but well-linked part of Zone 2 on a 95% interest only 35 year mortgage. The world will tell you that 95% interest only 35 year mortgages are the work of the devil, but it has been brilliant for me.
In the early 2000's my interest free mortgage was vastly cheaper than renting like my friends were doing, so I saved the difference. Saved enough to combine with DH and buy a house outside of London while keeping the flat in London.
The at is still on the same mortgage, but the value has soared. When the mortgage runs out I hope to have saved enough to pay it off. If not, I'll have to sell it to pay off the mortgage, but will then have money left to help with retirement/kids houses etc.
I feel incredibly fortunate. I bought just before the mid-00's boom while mortgage products were irresponsibly generous (which worked perfectly for me, though it got others in trouble). At the rush of sounding like a "don't eat avocados" boomer though, I did also save like crazy through school/uni/my 20's when my friends were going on holidays and had gym memberships and went out several nights a week. In the early 2000's, forgoing those sorts of things (the "avocados" of life) really did make it possible to buy houses . I know it doesn't now.