4 months before I was born so naturally, I have zero recollection. Dad says the news was broken in the evening. A quick internet squint found:
On BBC television, the first announcement to air was made at GMT 7:05 PM by a junior and unfamiliar newsreader, John Roberts, just prior to the program
Tonight.
Tonight continued with its planned edition until around GMT 7:26 PM when Roberts returned to provide updates of Kennedy's critical condition. Shortly after on air he answered a phone call from
BBC Monitoring which relayed news of the death of Kennedy as reported by the
Voice of America. Roberts' countenance visibly changed and he announced to the audience, "We regret to announce that President Kennedy is dead," before bowing his head and not looking up. For the next 19 minutes the BBC screened its logo and a revolving globe, punctuated by three bulletins read by Roberts. BBC management then decided to revert back to regular programming, screening
Here's Harry from GMT 7:45 PM, followed by
Dr. Finlay's Casebook, a decision which attracted over 2,000 phone calls and 500 letters and telegrams in complaint.