Episode #1.1 - S1-E1
Corrected entry: All of the telephone numbers in the 1976 diary begin with 01. This code was not introduced until 1995.
Correction: I grew up in London in the 1970's... the dialling code for London was 01... this was later changed to 071 for inner London and 081 for outer London. The 01 numbers are completely correct.
Correction: 01 was the geographical area code for London at the time.