Re-opening of stations at Donington and Pinchbeck, Lincolnshire on the Spalding to Sleaford line was often discussed years ago but has since gone quiet. Not sure about Pinchbeck as it's so close to Spalding but re-opening Donington seem like a no brainer and low cost quick win to me. It has everything already in place apart from platforms, which would be unstaffed and could be done relatively cheaply.
Existing line passing right by it with recently enhanced passenger service now hourly all day between Lincoln and Peterborough instead of ending around 4pm. Trains to places people people are likely to want to go to - Spalding, Sleaford, Lincoln, Peterborough and (by changing at Sleaford) Grantham/Boston/Nottingham. Line speed now up to 75 miles per hour and village/town population of over 7,000 (significantly larger than both Metheringham and Ruskington re-opened on the same line some years ago) providing extra patronage on existing trains that are far from busy south of Sleaford. All it needs is to make an additional stop (on what is a relatively slack schedule timing wise) and new some platforms. No new track, line re-opening, trains, staff or signalling needed. Seems like an opportunity missed or wasted.