U2 6104 then BA 551 at Fiumicino
Munich → Rome → London Heathrow
Timetable, Rome time
16:15U2 6104 from Munich at the gate
12:15BA 551 to London Heathrow leaves the gate
20 h apart on the timetable, overnight
BA 551 leaves 20 h after U2 6104 arrives on the timetable: more than half a day, so not a connection we count.