The dude said that I would need to cancel that contract, which would mean the number would be unused for 6 months, after which I could have it again. So I left the store pretty disappointed, walked down the road and then started thinking about the whole number portability thing - if you can have an 027 number linked to a vodafone account now then why was this so hard? I went back into the store and asked a few more questions to someone else, at first she sounded more positive about it but then she realised who I had been speaking to - apparently "He's the boss of Vodafone so he'd know".
I was all set to buy one tonight but now I dunno.. this might be one compromise too many. I may still head down around midnight and see what the queue's doing though.. I hate myself

Does anyone know any technical reason why they wouldn't switch the number?