I stumbled across veganbaking.net a couple of days ago, and now it's my favourite site! Once I went vegan I thought I would never eat a croissant again, given they're basically 50% butter, but then I found this recipe. The vegan butter recipe is awesome, just make sure to make a double batch so you can make the croissants and have some left over for other stuff.
I will definitely be making these on a regular basis. Thanks Mattie