That's what happened with the April copy, it arrived eventually (but for some strange reason not the 'special' subscribers edition) then the replacement what Peco sent out was delivered the same day as the May edition.
When I phoned Peco the other day to say I had not received my June edition they said another copy will be put in the post. I asked If they were aware of any problems with issues being sent overseas, particularly to Ireland and person I spoke to was not aware of any, I explained that I had this problem with the April issue and she seen that on my account and said that she would raise the issue with her manager, so will see what happens with the next couple of issues.