The airspace changes are to do with the HURN
Sectors at LACC (The London Area Control Centre at Swanwick).
For drivers of airliners or anyone that operates above FL155 ish there are some BIG changes to the airspace and routes WEST of SAM ORTAC, and also to the routes into the LTMA from the South and the West.
Consultation? Yes, about three years worth with those that are affected and also a comprehensive environmental impact study and consultation.
Some of it is here..
http://www.nats.co.uk/text/107/hurn_consultation.html
For the vast majority of the GA community there are no changes at all.
Best rgds
BEX