I used a bottling bucket with a little bottler fitted to fill the kegs. It went okay, but it meant I had to hold the keg up below the bucket, and they get really bloody heavy when they fill up. I think I will have a rethink of how I do this for the next time, but it came out fine in the end. The only other issue was that I lost about 2 litres of the brew to yeast at the bottom of the fermenter -I just couldn't syphon them out through the massive yeast layer. I will not pitch a whole 11g of safale next time I do this short of a brew.
I'm drinking a bit of the brew right now and I must say it is pretty damn nice. There's a bit of a strong hop bitterness at the back of the mouth, but this should mellow off in the kegs after a while.