I completely agree that Utilities and some essential industries should be nationalised. Unfortunately I can't forget (and at 72 I'm old enough to remember) how 'well' that went last time The Unions would need to grow up and join the 21st century before it would be any different a second time round.
The privatisations of the car industry, aerospace and telecommunications were pretty successful, although not without issues eg: foreign ownership. The rest has been a bit of a shambles