Originally Posted by
serfty
T4 security and South T3 pier security are one and the same.
Thanks for the clarification. I didn't realize that what you call 'South T3' was part of T3. I thought it was actually T4. Certainly, it is a long enough walk to be another terminal!
Having never flown out of T4 proper I guess I was confused. I should know my home airport better.