| Aircraft | Avro Lancaster lll |
| Serial Number | JB709 |
| Markings | PH-O |
| Burial/Memorial Country | United Kingdom |
| Burial/Memorial Place | Runnymede Memorial |
| Grave Reference | Panel 248.. |
| Epitaph |
| Phase | 1 |
| Panel Number | 91 |
| Service Number | J/23353 |
| Service | Royal Canadian Air Force |
| Group | 1 |
| Squadron | 12 |
| Trade | Navigator |
| Country of origin if different | Canada |
| Abbott H (Sgt) |
| Cairns J C (P/O) |
| Keates H M (Sgt) |
| Polden G E (Sgt) |
| Quanstrom W (F/O) |
| Ross J A M (P/O) |
| Start Date | 09-04-1944 |
| End Date | 10-04-1944 |
| Takeoff Station | Wickenby |
| Day/Night raid | Night |
| Operation | Mine laying in Baltic waters |
| Reason for Loss | Aircraft took off from Wickenby at 2123 hrs tasked with laying mines in the Baltic area. Aircraft crashed into the sea near Esbjerg harbour, Denmark. One body that of Keates was found near Blavand lighthouse on the 13th April 1944. Two days later he was buried at Esbjerg Fourfelt Cemetery. The rest of the crew are commemorated at Runnymede |