Meanwhile the Government is aware of this and is trying to fix it. But getting planning permission is a problem. Landowners along any proposed route create NIMBY opposition groups and file objections and lawsuits to block the new line.
Kier Starmer's one Big Idea is to streamline this, but its tricky. Nobody set out to make new infrastructure impossible: every planning rule was introduced for a good reason and has its defenders.
https://www.bbc.co.uk/news/articles/ceqq9vzdeqzo