The open consultation "Draft Aviation Policy Framework, July 2012" asks about extending Fifth Freedom Rights to Gatwick, Stansted and Luton. (pages 23/24 Sections 2.45 - 2.48).
http://assets.dft.gov.uk/consultatio...-framework.pdf
To my mind it begs the question if UK airlines are unprepared to develop hubs anywhere other than LHR, whether reciprocal 5th Freedoms would achieve the same purpose / be a stepping stone towards developing a range of London hubs ???