Hi Andy
Your connecting flight is provisionally booked as the 13.25 from Glasgow. We will confirm the exact time a couple of weeks before you travel, so it might be best not to make plans until then, if you can avoid it. This flight would give you about three hours or so to wait at Gatwick, and a lounge would be a good way to fill the time.
As for booking a lounge pass, the best thing to do is call us on the number at the top of this page. Our holiday advisors will be able to book one for you if any are available. If not, it will be easy to book your own lounge pass online. I found this link on the internet, whch gives info on the various lounges available.
http://www.gatwickinformation.co.uk/gatwick-airport-FAC-facilities-lounges.php
Kind regards,
Olly, your editor