Originally Posted by
ryan182
you can but as an EXP you may not want to, if you can use e-gates (which most can now) it takes seconds to enter UK then head over to First Wing for security and you're right in the FLounge. Much better/faster than Transit Security.
I did this in January. Took the bus T3 => T5, went through the e-gates, elevator upstairs, presented my documents at the First Wing and was in the lounge in less than 20 minutes.