I bought my first and second houses about 20 & 22 years ago. It works by paying interest only on the money borrowed for a set period and also paying into a savings (endowment) plan and using this money to pay for your house at the end of the set period.
I sold the first after only about 18 months and borrowed a bit more for a second. This was for small houses a long time ago - the first was £25k, sold for £40 and the second was £55k (mortgage £40K) and the two endowment plans totalling £55/month.
I moved into tied accommodation after a couple of years (still here) and used the money gained to pay off student loans and student debt but kept paying the endowment policies which are now ending 2022/23. My endowment polices guaranteed that they would pay out more than I paid in (some didn't but had potentially much better growth rates) and I just left them to fester instead of actively moving the money around for a better growth rate. I'm going to get about £35K and I paid in less than £14K - great, but it wouldn't be enough to pay off the mortgage. Just think if it had been the typically bigger numbers!
I remember the big endowment policy scandal as such, but am just curious to see if anyone still has this type of mortgage, and how is it going? How many had 'extra' to the mortgage at the end and how many didn't?