I predict it will happen on Wed which is the 31st and the final day before DSAT7 closes. It is in the hands of Sky now as other operators (VM and FS) have migrated over to the new Txp's. Sky Integration generally don't like old SID's remaining on previous transponders after EPG moves so some agreement has obviously been reached with the BBC and Sky to do their platform move at the last minute as to ensure the 11954H radio services remain until the Txp closes. The only time I've seen Sky retain services on old transponders they don't label the SID's and keep them 'live' for a couple of days, this means receivers can't see them but existing tuned receivers should be able to pick them up. This has been done for the benefit of cable headends who downlink and remux the services for their own platform.