If you want to create AI flightplans for Ipswich (of course you do!) you will need to paste the following line into your TTools airport.txt file
EGSE,N52* 1.88',E1* 11.98',128
All the parking/gates are GA_small, GA_medium or GA_large. There are only 3 GA_large gates, in front of the terminal building, which are intended for small airline traffic eg Suckling Airlines Dornier Do28s. If you want your AI planes to park in any of those spots you will have to paste the following line into the [fltsim.X] section (usually the very first section) of their aircraft.cfg files
