Just looks like a medical diversion...
DTE CHNG FLT☨ ORIG 29MAY
JFK 850P 12
DEL ☨ 930P
3JFK/ETD2120 CSV-DELAY DURING CUSTOMER BOARDING-E *2002
4JFK/OUT2120 OFF2140 *2040
1DEL/OVR DEL TO LHR ETA0945 PSGR SVC *0338*QSDRIA
2DEL/PRE2015 *0613
2LHR/IN0959 *0404
3LHR/ETD0700 MED-DELAY DUE TO MEDICAL NEEDS OF A CUSTOMER-E *0613
7LHR/AUTO REACCOM DLY FLT COMPLETED *0735*CRCYMG
5LHR/FLT 0292 STUB ORIG PLN DEP LHR ETD 0700 -