-2- means of a Home Office warrant, in which case the Post Office would get the same addition of traffic under much less favourable conditions owing to the withdrawal of the posters' goodwill. 5. It may well be that acceptance of pool postings under present circumstances will be challenged by some of my colleagues on the ground on which the previous proposal by the Post Office was rejected and it is to be expected that the Union of Post Office Workers will use their best endeavours to oppose it. 6.