Silver, agreed.
An addition to the grid there is a case for including the central electricity generating board, the railways, NATS, the utilities (electricity, gas and water and telecommunications companies), in other words, the "natural" monopolies and strategic infrastructure.
It doesn't necessarily need to be nationalisation for some or all of these. Municipalisation, co-operatives, not-for-profit companies, wholly publicly-owned companies are some of the other ways this could be achieved, but please, no more disasterous public-private partnerships (PPP) or private finance initiatives (PFI)!
However, it is unlikely to happen as none of the political parties are accross this agenda, and it certainly smacks too much of "socialism" to be of interest to the Labour Party.