In my experience, new builds have very decent insulation, which works well during Winter. But they are an absolute nightmare during Summer. British Summers are

In my experience, new builds have very decent insulation, which works well during Winter. But they are an absolute nightmare during Summer. British Summers are not so cool anymore. New regulations should account for this. My previous neighbor had a heat shock because her bedroom stayed over 33 C for a few nights in a row.