RM
20 districts, 10,002 postcodes
Havering, Thurrock, Barking and Dagenham, Redbridge, Epping Forest, Brentwood
| District | Postcodes | Local authority |
|---|---|---|
| RM1 | 511 | Havering |
| RM10 | 583 | Barking and Dagenham |
| RM11 | 572 | Havering |
| RM12 | 628 | Havering |
| RM13 | 659 | Havering |
| RM14 | 619 | Havering |
| RM15 | 574 | Thurrock |
| RM16 | 697 | Thurrock |
| RM17 | 534 | Thurrock |
| RM18 | 332 | Thurrock |
| RM19 | 143 | Thurrock |
| RM2 | 268 | Havering |
| RM20 | 160 | Thurrock |
| RM3 | 924 | Havering |
| RM4 | 160 | Epping Forest |
| RM5 | 379 | Havering |
| RM6 | 530 | Redbridge |
| RM7 | 576 | Havering |
| RM8 | 587 | Barking and Dagenham |
| RM9 | 566 | Barking and Dagenham |