Yes this is lots of fun.
If it is a comet then it's KT or DA
Both channel Airways and of course Olympic Airways had ceased flying them by 1972.
This is 1973.
I had just started my career in the holiday airline business the year before and was very involved in charter flight schedules and Monarch Airlines with their britannia's from what I recalled didn't go to Corfu but the Boeing 720b did as did BEA air tours 707s as well and Lakers
at that time no other airlines Britannia or vanguards were going to Corfu.
on the odd occasion Invicta vanguards flew for charter Airlines on a subbing basis down to the Mediterranean