why not just send him a message through his pics? like the "contact photographer" button...
Please do not hand over the email addresses of fellow photographers to other people. Airliners.net provides a "hidden email address" contact button to allow you the choice as to whether you want someone to know your email address or not.
Alastair has always responded promptly whenever I've emailed him, so his address on the database does work. He's from Glasgow, Scotland BTW.