Well I went for a ride along the Manton-Kettering section yesterday, very pleasant, £12+ First class return from Leicester with railcard but I did get 3 cups of coffee and some EMT complimentaries.
It started in a rare manner for me in that a Cross Country Birmingham-Glasgow came non stop through the mainly southbound platform 3 heading northbound.
There is some tree and bush clearance work going on around Corby, also I noticed a Green/yellow cable in areas from Ashwell to Kettering.
On the curve between Glendon East and South there is quite a bit of track re-alignment going ahead, also north of Kettering station there are piles of new ballast and a few hundred sleepers.
I am not sure when the Manton box will disappear but the line could do with a few more signals each way between Manton and Kettering when it is doubled.