Template:DATE April 20

1938 FA Cup Final first televised from Wembley.

1964 BBC2 begins 625 line transmissions from Crystal Palace. The planned launch of BBC2 postponed due to power failure at Battersea Power Station

1964 BBC Test Card D introduced

1964 BBC Test Card E introduced.

1970 BBC1 Keighley began colour transmissions on 625 UHF