I do not know what the case is on all forms, but from more modern registrations, such as for the production company behind The Grand Tour, W Chump and Sons [1], at least for adding directors, residential addresses are hidden away. Additionally, I would love to see any credible examples of abuse from this system, seeing as it has been around for a while.
[1]: https://beta.companieshouse.gov.uk/company/09668527/filing-h...