I'm in the middle of reading Pies and Prejudice by Stuart Maconie. Not only is it fun, he manages to get an incredible amount of detail into everything. Really worth looking at if you want to understand what people are like Up North - and if you're a planner in London, isn't that essential?
This book is pretty essential for anyone involved with communicating to the English. In 'Watching the English', Kate Fox, a 'proper' anthropologist, has looked at all aspects of English behaviour, from food rules to dress rules, from our houses to why we always talk about the weather. Much of planning is understanding why people behave as they do, this book gives you lots of hidden behaviours that will help.