Trade unions
I
| Full Name | Short Name | Notes |
|---|---|---|
| Independent Labour Party | ILP | not correct category, but needed here for "sponsored" box |
| Inland Revenue Staff Federation | IRSF | |
| Institute of Journalists | IOJ | |
| Institution of Professionals, Managers and Special | IPMS | |
| Iron and Steel Trades Association | ISTA | |
| Iron & Steel Trades Confederation | ISTC |