I have a problem with your question. It's this : I can understand why people would counterfeit currency £1 coins, it's been an epidemic almost since the day they were introduced. But why, given the difficulty and costs involved, would anyone bother to fake a proof £1 coin? Remember - these proofs are struck using highly polished dies on specially prepared blanks. Wouldn't it be more likely that the Mint's quality control (which as we all know seems to have been declining recently) had an off day, and the occasional rogue proof escaped? As to the details you asked specifically about alignment etc, I'll leave that to others who know more about that.  I agree with Peckris. Counterfeit pound coins are made by criminals who are only interested in the profit which comes with mass production. I know that there is a thriving trade in good quality counterfeits from the far east but these are for high value collectors' coins and the one pound coin has not as yet attained this status, not even the 1988 Gorringe 'rarity' (I use the term in the same way that it is used on eBay - tongue in cheek!). Looking at your excellent images I would say that the coin is definitely genuine, and from the pictures I would agree that it probably is a proof. The misalignment of the ends of the Bridges and Pathways motif is common on coins of that series and in particular the 2005 issue which, above the others, seems to carry more than its fair share of quality control issues. I would suggest that the coin may have been abused by a previous owner, resulting in the damage to the edges, there being no way of telling whether the coin had been removed from its capsule prior to your receiving it. I scrolled through your interesting series of fake pounds on Flickr, and found another 2005 with misaligned edges. Again, it is my opinion that coin is genuine, despite the misalignment of the Bridges and Pathways motif, and despite the weak strike on the obverse. I have seen a large number of genuine 2005 coins with these faults, all examples of the Royal Mint's poor quality control at that time.