I'll be traveling through Heathrow Airport for an eight hour layover, in about three weeks. I'll be returning home to the United States from a trip for work, and am looking at this as a reward, even if I only have a few hours. Many good tips have already been shared on this forum for where to go and what to do, so I don't want to rehash those questions and answers. But there are a few things I couldn't figure out. I would appreciate advice from those familiar with Heathrow.
(1) Are the Left Luggage centers reliable, and easy to access from the international terminal? For 10 pounds ($15), it would be worth it to me to leave my duffel, and even my laptop, so I don't have to carry it around. Would love to hear from someone who has experience using this facility -- if I think I may have to keep all my things with me, I'll carry-on less items for my trip home.
(2) If I get asked to go through one of the body scanners, I will opt out as long as that is an option. Is the resulting pat-down similar to what I'm used to getting in the U.S. when I opt out, or more intrusive? How long does it take?
(3) I think London should be reasonably warm this time of year: 40's or 50's Fahrenheit? I'm traveling back to Boston from Lagos, so I want to take the lightest jacket I can get away with. If I think it might be necessary, I will pack my Smartwool mid-weight shirt.
Thanks for any advice! I have not taken a Rick Steve's tour, but have read these forums for a while. My hope is to plan a real vacation to London, Wales and Scotland later this year or in 2016, so I'm looking forward to this quick glimpse of London.