I have sampled the food in the new LHR Club and Global First lounge twice over two trips in the past month - the quality was excellent, both for the breakfast items and the lunch/dinner selection. The service is extremely good in the Global First lounge - friendly, and very attentive. Two of the staff I talked with were brought to UA from the Emirates Lounge - and it showed in their style and professionalism. The Arrivals Lounge is equally good - full breakfast menu cooked to order for all GF/BF passengers.

These LHR lounges are definitely the crown jewel in the network now.

I took a number of photos of the lounges and food - will post when at a regular PC.