Originally Posted by
paulsalem
Thanks! And you're right, I was thinking about LHR arrival lounge. Thanks for that correction, I've edited my post above.
I went through fast track (via *G) earlier this week at DUB, and was by airside in less than 2 minutes. This was during morning rush.
With GE, even 1 hour prior would be okay, but you should assess based on your risk tolerance.