It's not the same but maybe it helps.
You've seen the first two deleted scenes (the only deleted scenes with Kay in it).
1: after the first training scene with the group when Marc had to stop running, Kay comes into the shower room and said to Marc: your breating is wrong, killing at long distances. Then Marc get's problems with his leg and Kay helps him. Then Marc said: lass, lass. Which means: stop it, don't do that.
2: Kay shows up unexpectedly in the canteen. (I think it was an alternative for the scene Kay shows up as the new collegue). This scene does not need words (I loved it, that look at Marc's face and the way Kay smiled).
3. Marc gives his dirty laundry to his mother. And while she is putting the laundry into the washer, she says to Marc: can't you talk with Frank about working all those nights (

). They talk a little and then Marc's mum finds a condom in one of his pants. She looks at it for a while but then she puts it aside. Marc stressed for a moment of course, but his mum didn't seem suspicious at all.
(In the audio comments I heard that this scene was meant to show the viewers that Marc and Kay had safe sex. No idea why the scene was deleted after all).