As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO LGW AT FL370, NR 1 FORWARD CARGO SMOKE DETECTOR LIGHT ILLUMINATED. PERFORMED COM PROCEDURE AND LIGHT EXTINGUISHED. FLIGHT DIVERTED TO PIK. DURING DESCENT, BOTH FIRE BOTTLES WERE DISCHARGED. FLIGHT LANDED WITHOUT INCIDENT. INSPECTED FORWARD CARGO COMPARTMENT FOR EVIDENCE OF FIRE, NONE FOUND. REPLACED NR 1 AND NR 2 CARGO FIRE EXTINGUISHING BOTTLES. OPERATIONAL CHECK GOOD.