BA’s Concorde Room in Terminal 5 of London Heathrow is one of the better lounges around. It is definitely what I would consider to be a Tier 1 Lounge.
The bar offers a wide selection of spirits as well as fresh squeezed juices. There is a vast variety of whiskey as well, including the popular first class favorites such as Johnny Walked Blue Label.
The dining area offers a nice experience with high quality food and good service. The dining booths provide a somewhat private dining experience, as you are separated by high partitions from you neighbors.
If you have a bit of extra time while at the lounge, there are also private “Cabanas” available for first class passanger use, which basically include a shower and bathroom area, an ottoman for resting, as well as a flat screen TV. Should you want to use this feature, be sure to mention it to the concierge desk upon checking into the lounge so they can reserve one for you.