For all new new builds. I believe existing ones are stuck with the problem. It's scandalous.
It does say on the government website that one of the new measures is 'working with the Law Commission to support existing leaseholders and make the process of purchasing a freehold or extending a lease much easier, faster and cheaper':
https://www.gov.uk/government/news/crackdown-on-unfair-leasehold-practices--2