https://flightaware.com/resources/airport/EGCC/map is a current overhead view of the real world EGCC. It has two approximate 10,000 foot parallel runways separated by 6,000 feet with the intent during busy traffic times to use one for takeoff and another for landing simultaneously.
FS9 default airports do not recognize simultaneous run way operations. What scenery add-on are you using for EGCC if any. You can dedicate this type of operation by setting runway priviledges on EACH END the same, one runway for takeoff and the other for landings.
This is the FS9 default EGCC partial runway information as shown in the freeware Airport Design Editor. There are others but please do not use AFCAD which is outdated and might corrupt your scenery files. The default EGCC has both runways enabled for take-off and landings. Modify so one is set for landings only on each end and the other take-off only on each end.
The default EGCC Runway 6L/24R has ILS systems at each end and would be the preferred runway for landing.
https://en.wikipedia.org/wiki/Manchester has a good discussion included about EGCC operations and design choices. Also note that while parallel, the runways are offset lengthwise from each other. This reduces taxi paths crossing an active runway.
As John stated, there are runway entrances and exists besides the beginning points and for heavies some taxiing to one end of the runway via the runway (taxi-back) might be required.