Kevin58 said:I used to be a slave to style guidelines but the more I learn about beer and beer history the more I discover the guidelines are rubbish. There is so much misinformation in the descriptions of some beers that clearly do not match the factual, historic record that it destroys all confidence in the whole process. If you are planning to enter the world of competition then by all means you will have to follow the guidelines or you will never succeed. Otherwise use your own senses. If you like London porter, drink as many examples as you can. Learn about them and then make something similar that makes you happy.