I am traveling to London with my dad on Memorial Day weekend. We are taking the adventurous route and going on S4 status aka the dreaded Buddy Pass. My Delta friend (very senior FA) gave me access to her passes so I'm taking my dad back to the place of his birth; Scotland. He is now 90 and left Edinburgh when he was three. Hasn't been back to the UK since WWII. The DL loads look great (so far) and I'm hoping we get cleared for business class from Bos to LHR. But we might not get on the first flight so I'm planning for time in the terminal. I don't have DL Lounge access and don't want to buy day passes that we might not use. Any ideas for a great way to spend some time in the DL terminal in BOS or LHR are welcome. Fingers crossed for business class clearance on the early flight.