T3 Iris (both open) spat out the dreaded receipt to me today, less than a year after I registered. It *claimed* it expired on Monday 16th May, however
I used it on the 17th with no problems at T5!
Haven't used T3 since April, when it worked fine.
Fortunately there was no queue. The immigration officer was very helpful, and told me it had expired on the 16th (I could see that). I stated I'd used it on the 1th, and asked if there was a problem. "No problem, all I know is what's on the receipt".
Sigh, I'd been on course to beat 10 minutes Plane->Train too
