Really! I live in Norwich and we don't get 'done' till later in the year. We are on the Tacolnston transmitter. Which transmitter are you getting Anglia from?
Re Aerials. We have an old 7 element aerial and get good reception on Analogue and Freeview. There are a number of Aerial companies around here who are trying to frighten people into getting new installations by advertising that you will lose all your reception unless you upgrade.
Sandy Heath transmitter has already had analogue switch-off. Other Anglian transmitters are broadcasting both digital and analogue at present. Sudbury switches off in July and, as stated earlier, Tacolneston in November. There are updates even before switch-off. It is possible that you are receiving some Freeview channels from a transmitter prior to analogue switch-off. Our area is the last to convert and I should not be able to receive Freeview according to the predictions of the website but I get all channels with only very occasional minor problems.