I expected a guide covering the whole of the British countryside listing Tea Rooms in secluded villages. However; with only one Tea Room listed in the whole of Lancashire and almost 40 entries just for London, including several expensive hotels, ie: Browns Hotel - Afternoon Tea @ £39.50, this seems to be more of an exclusive guide to members of "The Tea Guild", rather than someone looking for a decent cup of tea & a bun.
I can get more info from the internet by just typing "Lancashire Tea Rooms" which has 34 entries - most of which provide afternoon tea for the price of this guide.