Hypnobirthing.. classes, workshops, courses, online courses, books, videos.. what is actually useful? A few people told me that attending a physical class is worth it. Is it? If so, which one can you recommend? Does it have to be a 2 day course or is 1 day enough? Don't want to clutter my brain, already doing antenatal course, but do want help with 1st labour.. Anywhere in SW London you could recommend? thanks!