So, i'm an outsider to England (Northern Irish). I've been living in East Anglia for 4 years, for Unviersity. To me, the Electrified network here is decent. Most towns i.e. Norwich, Cambridge, Chelmsford, Ipswich have at least one Electric service, indeed small, rural towns such as Ely and Downham Market have Electric services. Now, I look online at places such as Oxford and Aylsbury. From what I can see, the high density Electrification has stopped west of Hertfordshire. Berkshire, Oxfordshire etc are counties that have high population densities, relative wealth and close proximity to London? So why would Kings Lynn and Ely have Electrified service over and above these key towns?