BA 975 then BA 964 at Heathrow
Berlin → London → Hamburg
Timetable, London time
12:10BA 975 from Berlin at the gate
11:30BA 964 to Hamburg leaves the gate
23 h 20 apart on the timetable, overnight
BA 964 leaves 23 h 20 after BA 975 arrives on the timetable: more than half a day, so not a connection we count.