The ACP submitted to raise the base of Solent CTA-6 by 500ft to make it level with the base of CTA-7 has been approved by the CAA and will be implemented on 26th May 2016.
From CAA Skywise:
Solent CTA RoCSA Decision
The CAA has approved the FAS VFR Implementation Group’s proposals to disestablish a portion of controlled airspace within the Solent Control Area (CTA), in accordance with the CAA’s policy for the Release of Controlled and Segregated Airspace. The proposals, which will see the base level of CTA-6 raised to 3,000 feet above mean sea level thus releasing 500 feet to Class G airspace, will be implemented on 26th May 2016