Going back to the proposal for electrifying Crewe - Chester, I cant help but feel this is a case of the tail wagging the dog.:roll:
In the early 1980's, British Rail drew up an (ambitious) electrification programme for the network. Due to various factors, only parts of the overall plan have since come to fruition. However, the idea was nationally based & portrayed as being for the benefit of the country as a whole.
Today, we have proposals to wire a 21 mile section of line in order to satisfy a local demand. Yes, I know that demand on the Chester - London services has shot up since the introduction of the hourly service, but the electrification proposal only deals with this one aspect - it doesn't fit into any overall strategy for the UK rail network.
I recall when the line between Stockport & Hazel Grove was wired, the then chairman Sir Peter Parker was quoted as saying, "Lets hope the Midland Mainline isn't authorised in 2.5 mile setions". Well, we're still waiting for the MML to be wired, but it does seem that Sir Peter's phrophicy has come true, at least to some extent!.
On an similar theme, it could be argued the the GWML electrification is being done in a similar vein. Piecemeal to serve the interest of the current TOC & government objectives rather than as part of a long term plan to make things more efficient all round.