Aussies say 暴肥 too,. US and UK say 不肥, Searched from 3 countries' google sites. Your 12BP for two people is cheap. Here, 2 pancakes + 2 bacons + 2 eggs cost me US$14 before sales tax and tips. Enjoy your UK life.
It seems the price of food is cheaper than HK. I think you will have Bristain living symdromes when get back to HK as things are unreasonably expensive in HK now...