| Code | Name | Alt Name | La | D | M | S | Lo | D | M | S | Opened | Use on 1st Dec 1944 | Current Use | Contributor Remarks |
| X6MM | Macmerry | Tranent | N | 55 | 56 | 57 | W | 02 | 53 | 29 | 1929 | RN HMS Nightjar. RAF. 13 Grp. Fighter Ops | Agriculture | Now part farmland/industrial estate. |
| X3MD | Madley | -- | N | 52 | 01 | 56 | W | 02 | 50 | 55 | 1941 | RAF. 27 Grp. Radio School | Industry | BT international satellite communications and exchange station. Industrial estate using some original buildings. (11/2005) |
| X8MB | Maghaberry | -- | N | 54 | 30 | 53 | W | 06 | 10 | 44 | 1941 | RAF. NI. Parent station | Prison | Some buildings remain. |
| X3MB | Manby | -- | N | 53 | 21 | 30 | E | 00 | 04 | 59 | 1938 | RAF. 25 Grp. EAAS | Airfield | Closed 1974, hangers now EC grain stores. Buildings in use by local council as are hardstandings and transport buildings. Runways still active,used by light aircraft and gliders. |
| EGCC | Manchester | Ringway | N | 53 | 21 | 13 | W | 02 | 16 | 30 | 1937 | RAF. 38 Grp. Parachute Trng | Airfield | Active |
| EGCD | Manchester | Woodford | N | 53 | 20 | 17 | W | 02 | 08 | 56 | 1925 | Avro production | Airfield | Avro. Operational |
| EGCB | Manchester | Barton | N | 53 | 28 | 18 | W | 02 | 23 | 23 | 1930 | -- | Airfield | Active |
| X1MA | Manningford* | -- | N | 51 | 20 | W | 01 | 50 | -- | RAF RLG | n/k | Extinct. | ||
| X3MF | Manor Farm Airfield | -- | N | 52 | 27 | 52 | W | 00 | 18 | 42 | -- | -- | PS | -- |
| X2MS | Manor Farm Strip | Marlborough | N | 51 | 18 | 19 | W | 01 | 40 | 05 | -- | -- | PS | -- |
| X3MJ | Manor Farm* | -- | N | 52 | 55 | E | 00 | 57 | -- | -- | PS | -- | ||
| X2MR | Manor Farm* | Compton Chamberlayne | N | 51 | 03 | W | 01 | 57 | -- | -- | PS | -- | ||
| X5MF | Manor House Farm | -- | N | 54 | 09 | 02 | W | 01 | 25 | 15 | -- | -- | PS | -- |
| X7MB | Manorbier | -- | N | 51 | 38 | 48 | W | 04 | 46 | 31 | 1935 | RAF. 70 Grp. Fighter AACU | Agriculture | Some buildings remain. |
| EGMH | Manston | -- | N | 51 | 20 | 32 | E | 01 | 20 | 46 | 1916 | RAF. 11 Grp. Fighter Fwd A/F. Also MDA | Airfield | Active |
| X9MN | Manton | -- | N | 51 | 25 | 43 | W | 01 | 46 | 27 | -- | -- | PS? | -- |
| X0MH | Manywell Heights* | Cullingworth | N | 53 | 49 | W | 01 | 54 | 1916 | WW1 use only. | n/k | LG. 33, 76 Sqns. Extinct. | ||
| X3MG | Marchington | -- | N | 52 | 52 | 04 | W | 01 | 47 | 27 | -- | USAAF. Supply | Agriculture | Ex US Army site now buried under the A50. Some buildings remain. (06/2002) |
| X0MN | Marden* | -- | N | 51 | 10 | E | 00 | 32 | -- | -- | n/k | Still listed in 1932 | ||
| EGYM | Marham | -- | N | 52 | 38 | 54 | E | 00 | 33 | 02 | 1937 | RAF. Bomber. Under construction | Airfield | Operational with Tornado GR1/4 and Canberra PR9 & T4. |
| X0MD | Market Deeping* | -- | N | 52 | 41 | W | 00 | 16 | -- | WW1 use only. | n/k | -- | ||
| X3MK | Market Harborough |