On Friday 1 November 2019, BI5 from BWN to MEL (instead of arriving at 0455 hours bright and early) pulled in at 2111 hours, 976 minutes late. BI6D, the 1845 hours MEL - BWN has naturally been delayed with B788 V8-DLD airborne at 2233, about 210 minutes late.
This aircraft often (though not always) forms BI3, the 0010 hours redeye from BWN up to LHR. With many passengers on BI6 (tonight it has a 'D' suffix for 'delayed') connecting on to London, it's highly likely that BI3 will run late as BI6 should arrive BWN at about 0145 hours, so BI3 may be able to depart - depending as to whether it's the same or another aircraft - from around 0300 hours. The plane then typically is at a hardstand at LHR all day so this ought allow it to resume the published timetable.