The Boundary Commission is looking into the constituency boundaries with the aim of reducing the totally number of MPs by 50, and also to equalise the size of the constituencies.
The Boundary Commission’s recommendation is that Norbury leaves the current constituency, Croydon North, and becomes part of a new Streatham & Mitcham constituency.
For local government Norbury would remain in Croydon.
The new constituency would cover three local authorities, Merton, Lambeth & Croydon.
There is more information here and you can leave comments.
This consultation also lasts to 5 December 2016.