Yes, id like to know as well!
@TinkerSofi what's this about a 'free' cocktail reception?! Is this another thing us UK brides are missing out on!
If you are working with a GI certified TA, there are different perks. One of the incentives is for a free cocktail reception, all the way up to free limited private events based on the number of rooms/nights you book in your wedding group block. You should talk to your TA about this and ensure it is also open to you. Im not sure if you are eligible if not working with a GI certified TA though.