Originally Posted by
skit53
I was able to use the T4 lounge despite my flight leaving from T4S. I wanted to take a quick shower before visiting the city (had a long layover). The gentlemen there did mention that my flight did not depart from T4, but did not say much more than that.
You were lucky! Normally the T4 lounge guardians won't let you in with a T4S BP.