Ahead of the switchover, Digital UK said it believed thousands of analogue TV sets in the area needed to be converted to receive digital.
Freeview viewers also need to retune their TVs or they will lose BBC One, BBC Two, BBC Three and BBC News.
An estimated 12 million viewers are affected in the London area, but the majority of
homes had already switched to digital.
The switchover comes 75 years after the first regular TV service began in London.
via BBC News