Airports.txt has a 3.00 degree glideslope for runways 02 and 20. Runway 02 should be 3.50 and runway 20 should be 4.48. The correct entry should be as follows:
A,EGKA,SHOREHAM,50.835556,-0.297222,7,6000,0,3300,0
R,02,21,3399,59,0,0.000,0,50.832750,-0.299058,7,3.50,40,1,0
R,06,63,2621,82,0,0.000,0,50.833531,-0.297678,5,3.00,40,1,0
R,13,124,1339,59,0,0.000,0,50.838339,-0.294522,7,3.00,40,1,0
R,20,201,3399,59,0,0.000,0,50.839078,-0.295100,7,4.48,40,1,0
R,24,243,2621,82,0,0.000,0,50.835931,-0.290078,6,3.00,40,1,0
R,31,304,1339,59,0,0.000,0,50.836233,-0.289742,6,3.00,40,1,0