The Junior Men in Black play in the following leagues:
| U17 A XV | Herts / Middlesex Junior League Div 1 |
| U16 A XV | Herts / Middlesex Junior League Div 1 |
| U16 B XV | Herts / Middlesex Junior League Div 4 |
| U15 A XV | Herts / Middlesex Junior League Div 1 |
| U15 B XV | Herts / Middlesex Junior League Div 6 |
| U14 A XV | Herts / Middlesex Junior League Div 2 |
| U14 B XV | |
| U13 A XV | Herts / Middlesex Junior League Div 1 |
| U13 B XV | Herts / Middlesex Junior League Div 6 |
