Permitted development rights will not be extended.  The new Class O in the general permitted development order (that is to come into force on 15 April 2015) prevents any use of an office for residential purposes from beginning after 30 May 2016.  The recent and contentious approval granting of permitted development rights for Utopia Studios is now looks pyrrhic, as it is unlikely the rights will be able to be exercised before these permitted development rights die.