After 6am 16th November 2011, viewers in Suffolk and Essex who receive the full Freeview service from the Sudburytransmitter will need to do a full retune of their Freeview boxes - you must perform a "first time installation" retune (sometimes "Factory Reset" or "Shipping Condition") to ensure you can watch the all the available Freeview channels on the correct channel numbers.
Sudbury not see the commercial multiplexes operating at their final power levels until 27th June 2012. On this date SDN will move to C58, ArqA to C60 and ArqB to C56. Until this time some viewers on the edges of the service area for the transmitter will be unable to receive the commercial services.
I wouldn't get too excited. When your normal reception of a missing mux is just below the critical level it only needs a slight change from atmospheric conditions to make it appear. Your gain is likely only temporary.
It does seem a tad strange though that through a wide variety of atmospheric conditions since 16th November ("a day that will live in infamy" hehehehe), there's been not a flicker of the mux. Then all of a sudden on Thursday 19th evening, it appears.
Anybody else got problems with 5* breaking and freezing after the Sudbury retune yesterday? My aerial is Triax black 11 element only 6 years old, situated in the valley at Chappel. Great to see the return of film 4.