Is LHR-Hilton quiet enough to sleep?
I'm arriving at LHR (Terminal-4) 8:30pm, continuing next day (from Terminal-1) at 11:30am.
HHonors site says it is possible to walk from Terminal-4 to LHR-Hilton - how much time of walk this is?
Is LHR-Hilton quiet enough to sleep (being next to airport), or you will recommend something else?
Thanks in advance.