Exec. lounge open 7.00am to 7.00pm - that's a bit of a joke for an airport hotel.I know Glasgow Hilton Exec floor serves freebies to 10.00pm. They must not want to give much away at LHR. Possibly because they want you to use the overpriced restaurants!! Use the J.D Wetherspoons pub in T4 landside - Food and Drink is keenly priced.
Alan