Be careful about cancelling your politcal levy , without a politcal levy the union could not campaign against privisation including the remaining 30% , the union cannot campaign against off comm and unfair competition , the union cannot campaign on closures of Mail centres , RDCs and relocation of delivery offices. It could not campaign against post office closures , argue politically against the new tribunal rules , zero hours , anti employment laws , support other unions who are taking strike action , campaign against the BNP etc and an hundred other inportant issues.
Unions are not allowed to use any of their general fund to campaign on the above. The union has to every 5 years allow members to vote on whether the union has a politcal fund and the next ballot is in October.
Only £3.30 per member from the politcal fund goes to the Labour Party and under the Collins report all members will next year before the next election have to give their indivdual consent for any money to go to the Labour Party. However if you remove yourself from the politcal levy altogether then the union loses the ability to campaign to keep the remaining 30% stake in public hands , fight against TNT from having an unfair playing field in terms of end to end delivery which will threaten the USO and our futures.