Biggin actually isn't too bad - you can go and sit in the cafe in the terminal where crews waiting for pax tend to hang around. It's actually not a bad place to network. I didn't get a job that way but when I did recently cross paths with some corporate guys, they remembered me and said "stay in touch".
A lot of it is sheer luck. One friend as an FI used to drink with a regular group in a near to airport pub, and one day the right chief pilot joined the group. A week or two later he had a job.