LH 918 then BA 562 at Heathrow
Frankfurt am Main → London → Rome
Timetable, London time
18:45LH 918 from Frankfurt am Main at the gate
18:20BA 562 to Rome leaves the gate
23 h 35 apart on the timetable, overnight
BA 562 leaves 23 h 35 after LH 918 arrives on the timetable: more than half a day, so not a connection we count.