FlyerTalk Forums - View Single Post - T1/T2 airside connection at Heathrow?
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Old Jul 17, 2014, 11:58 pm
  #4  
alanR
 
Join Date: May 2005
Posts: 7,605
Normally you won't be allowed into a terminal unless you have a boarding pass for a flight from that terminal.

Certainly the routing suggests security checks which will check boarding cards
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