March Whitemoor Junction signal box once stood where the vast

Whitemoor Yard and the former GN and GEJR line to Spalding diverged. With the closure of both of these pieces of railway infrastructure at different times the box was also eventually shut. I have been able to find out precious little about the box but it appears to be
of a later type of Great Eastern design with its more simple features. Notice that the locking room windows have been bricked up but with the bricks looking relatively new this appears to be a recent change. If anybody could provide me with some further information on this box it would be appreciated. Of course, the once vast marshalling yard partially reopened and now handles vast quantities of ballast for Networks Rail's infrastructure work.