In the UK the airline and telecom privatisations were largely successful (BA, Rolls Royce, BT, etc). BP did okay too.
For some reason things that happen in the air seem to privatise much better than things that happen on the ground.
MG might be the exception, but it’s a bit of a weird situation in that it went from being owned by a loss making British state owned enterprise (Leyland) to being owned by a loss making Chinese state owned enterprise (SAIC). Still makes popular, cheap and not very reliable cars though.
The key is competition. BP compete on the global oil market. BA compete freely with other air companies. RR with other turbine manufacturers (not many of those globally!).
The semi-successful ones are the "shell company" ones: telecoms, power, and railways. The user gets a choice of who to get customer service on, which feels nicer than a government bureaucracy, but the infrastructure is a natural monopoly so the actual hardware delivering the service is mostly the same.
Electricity markets work pretty well as a market and has miraculously managed a lot of carbon transition, but is now horrendously expensive (like trains) in a way that's becoming politically important. The public are going to demand that something be done. AI power use is not helping here.
The less successful ones are the actual big capital asset ownership ones: RailTrack PLC, OpenReach, water companies, the nuclear industry.
For some reason things that happen in the air seem to privatise much better than things that happen on the ground.
I know that there are some nuances to this, but this makes sense right? If you think you can compete on say London-Amsterdam, your airline can in principle decide to compete there (yes, they need slots, etc.).
If you want to compete with rail between Amsterdam and Berlin, you are either going to pay an insane amount for extra infrastructure (too expensive) or you have to let companies bid on exploiting a line. But you can never have two companies competing at exactly the same times.
But let's all take a moment to acknowledge that it would be awesome if they had them. Can you imagine the shenanigans you could get up to designing a nationwide 40,000-foot-high rollercoaster system?
BT was only successful if you take a very narrow view of success. They dragged their heels on rolling out ADSL to maximise short-term profits from ISDN which has had a hugely negative effect on the country.
Government spent decades figuring out how to regulate it and even today OpenReach is far than ideal.
These entities are not really the same kind of thing. BA and RR were successful private companies that ran into difficulty for one reason or another and took on the UKG as an investor of last resort. BT was an offshoot of the Post Office, a service that is run by the government even in the USA. BP was government controlled for...geopolitical reasons.
There are some nuances to it. British Airways (not the original British Airways Ltd [0], who merged to form BOAC) was established to manage several existing airlines that had already been nationalised (BOAC, BEA) and two regional carriers (Cambrian Airways and Northeast Airlines).
Of course BOAC and BEA had been made my consolidations of many smaller airlines which gets messy quickly when tracing the lineage. Even Cambrian and Northeast had formed British Air Services prior to this which was 70% owned by BEA.
So it is technically true that is was started as a state owned airline, but one made from companies that were originally created as private with a mixed history of state ownership.
For some reason things that happen in the air seem to privatise much better than things that happen on the ground.
MG might be the exception, but it’s a bit of a weird situation in that it went from being owned by a loss making British state owned enterprise (Leyland) to being owned by a loss making Chinese state owned enterprise (SAIC). Still makes popular, cheap and not very reliable cars though.