Contractually Channel 5 are probably still paying for that transponder with a new contract on the 1N Txp. If I were paying for something up until a certain date even though no viewers were watching it I'd request them leave it on just out of principle!
As for the encryption it's been suggested that C5 and ITV may have continued on a sort of Month by Month rolling basis until 1N was ready to deploy. Don't forget it was meant to launch July 1st so behind schedule anyway. My guess would be that C5's encryption will be removed from all their services on the 1st December, thus giving Freesat five and seven days, respectively, of testing on their services.
I suspect also that with C5 being regionalised on Freesat for the first time and C5+1's launch, together with all other C5 services being added, doing all of this concurrently would have been a major over-air EPG update in one go, especially considering the C5 regionalisation is going to be a large'ish update just for a single EPG LCN.
I reckon C5 will regionalise together with C5+1 on Freesat from 6th, leaving the other four EPG slots to be filled with C5's other services on the 8th. I can't now see why, when they can, C5 will just keep a single Region 2 feed on Freesat. I'm in Region 3 so if they make this change I'll check and be aware of it.
