I came across an issue with missing data for EGLC. In file CIPF/EGLC.dat there’s missing lat/long data for runway 09 (I guess the end of the runway?):
RWY:RW09 , , ,00017, ,ILST,1, ;
RWY:RW27 , , ,00019, ,ILSR,1, ;N51301773,E000035384,0243;
This causes crashes with some planes that use this data in their FMS systems.