Having never been to the UK but seeing what has happened here in the last 35 years in housing costs (in the USA) I can understand your plight. Right now we are experiencing another rise in the Average house price, along with a sustained almost record low in the interest rates, with a guesstimated average of about 5.0% for a 30 year fixed loan and even lower right now for flexible. One thing thing though is that we (all I know and what I have read) is that there has never been a "reduction" of prices, just a tapering off of increase. I watched a home I had that chance to buy with my then new wife in CA in 1970 for $30,000, but ended up renting, one year later it sold for $62,000. I moved out of the area but several years (1982) later I noticed it went on the market again for $185,000, and after I moved to NY I found out it sold for $310,000. I know this because I made very good friends with a neighbor when I lived there, and never moved (he paid 28,500 for his house in 1966, and feels he could get $300+ for it now)
And a sidebar note: how much have your wages gone up in 40 years?????