"Cork Gdansk unbookable from 30th September"
Yeah, GDN-ORK-GDN, which is presently 3x weekly, will go to 2x weekly at the beginning of Sept. and be eliminated completely from the end of Sept.
"I have read that they are closing Gdansk-Cork because they will increase Poznan-London Luton up to 7 a week."
But POZ-LTN-POZ is already 7x weekly/1x daily.