This work may not affect most people on the forum, but worth mentioning.
This will mean no trains between Milton Keynes Central and Northampton between these dates- with bus replacements. It will affect all Euston to Northampton London North Western trains (not running north of Milton Keynes) and Euston to Birmingham via Northampton LNWR trains (not running between Milton Keynes and Northampton), also the handful of early morning and late night Avanti trains which route through Northampton.
Main line services direct to Rugby (via Roade between Hanslope junction and Hillmorton junction) on the main line are not affected, and the few Avanti trains affected will be diverted on the direct line via Roade.