LISAs are a trap if you want to buy in the South. You can only use it if the value of the property is £450k or less. The limit hasn't been raised since 2017 despite crazy house price inflation. So many people got completely fucked by this; they have their money locked up in the LISA, can't buy a house near London with it, and can't transfer it to something else without a huge penalty.
See: https://www.moneysavingexpert.com/news/2025/06/lifetime-isa-...
More broadly, "the govt pays the rest" is part of the problem. All this help-to-buy stuff amounts to demand subsidies that just push prices higher and higher.