stars: 240 x 90 seconds, f3.5, ISO1000.
foreground: 1 x 90 seconds, f3.5, ISO100 at dawn.
Forgot my torch, set the whole thing up in complete darkness and guessed the focus. I'm rather pleased with the result.
I'd like to say a big thanks to the airline pilots that are on strike, it saved me about 5 hours with the clone tool (the glow on the bottom left is a major airport).