Originally Posted by
corporate-wage-slave
If your boarding pass for the next flight is the next calendar day then you won't have access to any terminal airside area. There are a few exceptions but LHR is shut at night.
Bummer but kind of what I thought. I knew the lounges werent 24/7 l like in the ME but was hoping maybe could at least enter air side 24 hours before. I will figure something else out.