Political organisations
| Name | Type | Notes |
|---|---|---|
| Welsh Drama League | Miscellaneous | |
| Welsh Nationalist | Pressure group | |
| Welsh Plate & Sheet Manuf Assoc | Miscellaneous | |
| Wesleyan | Religious | |
| Western European Union | Miscellaneous | |
| Western Liberal Federation | Party group | |
| West Kent Agricultural Protection Association | Pressure group | |
| Westminster Foundation for Democracy | ||
| WETUC | Pressure group | check full name |
| William Morris Club | Social club | |
| Women2Win | Pressure group | |
| Womens' Advisory Committee | Pressure group | |
| Womens' Co-op Guild | Miscellaneous | |
| Womens' Labour League | Party group | |
| Women's National Liberal Federation | Party group | |
| Womens Organisation | Pressure group | |
| Womens Unionist Association | Party group | |
| Women's Voluntary Service | Miscellaneous | |
| Woolwich Arsenal | Miscellaneous | |
| Workers Educational Association | Miscellaneous |