The Squadron’s Operations Record Book shows that EC Gregory was the Captain of a 35 Squadron aircraft on the following sorties:
- 03/11/1943 Dusseldorf
- 11/11/1943 Cannes
- 22/11/1943 Berlin
- 29/12/1943 Berlin
- 14/01/1944 Special target
- 20/01/1944 Berlin
- 21/01/1944 Magdeburg
- 15/02/1944 Gardening
- 19/02/1944 Gardening
- 20/02/1944 Stuttgart
- 24/02/1944 Schweinfurt
- 25/02/1944 Augsburg
- 01/03/1944 Stuttgart
- 18/03/1944 Frankfurt (Aborted)
- 22/03/1944 Frankfurt
- 24/03/1944 Berlin
- 30/03/1944 Nuremberg (Incident)
- 18/04/1944 Rouen
- 20/04/1944 Cologne
- 22/04/1944 Dusseldorf
- 24/04/1944 Karlsruhe
- 11/05/1944 Hasselt
- 19/05/1944 Boulogne
- 22/05/1944 Dortmund
- 27/05/1944 Bourg Leopold
- 28/05/1944 Mardick
- 05/06/1944 Maisy
- 08/06/1944 Mayenne
- 11/06/1944 Paris
- 15/06/1944 Fouillard
- 09/07/1944 L’Hey
- 12/07/1944 Thiverby
- 18/07/1944 M-Cagny (Daylight)
- 18/07/1944 Wesseling
- 23/07/1944 Kiel
- 24/07/1944 Stuttgart
- 25/07/1944 Stuttgart
- 28/07/1944 Stuttgart
- 05/08/1944 Acquet
- 09/08/1944 Foret De Nieppe
- 12/08/1944 Russelsheim
- 14/08/1944 Falaise
- 11/09/1944 Le Havre-Cadillac 2
- 12/09/1944 Frankfurt
- 15/09/1944 Kiel
- 06/10/1944 Dortmund
- 14/10/1944 Duisburg (Daylight}
- 15/10/1944 Wilhelmshaven
- 19/10/1944 Stuttgart
- 21/10/1944 Hanover
- 25/10/1944 Essen
- 29/11/1944 Dortmund
- 29/12/1944 Gelsenkirchen
- 02/01/1945 Ludwigshafen
- 07/01/1945 Munich
- 14/01/1945 Grevenbroich
- 16/01/1945 Zeitz
- 22/01/1945 Gelsenkirchen
- 28/01/1945 Stuttgart
- 01/02/1945 Mainz
- 02/02/1945 Wanne Eickel
- 13/02/1945 Dresden
- 14/02/1945 Chemnitz
- 27/02/1945 Mainz
- 05/03/1945 Chemnitz
- 07/03/1945 Dessau
- 08/03/1945 Hamburg
- 11/03/1945 Essen (Daylight)
- 12/03/1945 Dortmund
- 15/03/1945 Misburg
- 18/03/1945 Witten
- 20/03/1945 Heide
- 27/03/1945 Paderborn
- 03/04/1945 Nordhausen
- 09/04/1945 Kiel
The following shows the composition of his crew on these sorties, along with the number of sorties undertaken by each airman as part of his crew:
| (Pilot) | Gregory | EC | 75 |
| (Navigator) | Burden | JWS | 1 |
| Carter | LC | 1 | |
| Howell | RH | 21 | |
| Lawless-Pyne | LC | 1 | |
| McGuinness | PP | 1 | |
| Roberts | WF | 1 | |
| Trott | CTJ | 47 | |
| Wright | HC | 2 | |
| (Air Bomber) | Brooker | BC | 1 |
| Day | MJ | 1 | |
| Ferguson | WG | 1 | |
| Kermode | DW | 49 | |
| Lancaster | J | 22 | |
| Marshall | JLG | 1 | |
| Myers | JF | 1 | |
| (Wireless Operator) | Cleaver | GH | 1 |
| Curtis | NW | 7 | |
| Marriott | AR | 1 | |
| Matthews | TH | 14 | |
| Sadler | RH | 46 | |
| Shippen | SJ | 1 | |
| Stroud | HRM | 5 | |
| (Air Gunner) | Black | JC | 1 |
| Bolton | DR | 22 | |
| Fyfe | DF | 1 | |
| Hunter | RET | 1 | |
| Lille | GE | 1 | |
| Moffatt | N | 1 | |
| Nuttall | S | 73 | |
| Perry | GA | 1 | |
| Stewart | WJ | 49 | |
| (Flight Engineer) | Dick | AJ | 27 |
| Jones | WCR | 1 | |
| Scholes | M | 1 | |
| Seaton | CDE | 1 | |
| Sharp | MB | 1 | |
| Weaver | J | 44 |
