gilesdavies, That photo IS from the terminal you are talking about. When the new departure lounge was built in 1985 the check-in desks were moved to either side. Monarch's baggage belt went under the check-in area's floor. I guess the tunnel is still there to this day.
The new lounge opened in 1985 before the duty free shop was built. As already stated there were more seats then than there is now! Years later a mezzanine floor was added to increase capacity and later still when the pier was added it was accessed by breaking through a high level glass section to the right of the clock.
This departure lounge had a full height screen that could be moved across to create a smaller lounge for domestic flights to Belfast which I think can be seen straddling the clock.
