Completed the survey today....main points I made;-
1. Comfortable & roomy DC lounges.
2. If they wanted to know how to cater, pop into a BA, KLM or even a Servisair Lounge....at any of these you can get a sandwich or filled croissant.
3. Beer choice at LHR terrible (was non existant for 18 months!)....supposedly flagship Lounges!