High Quality Content by WIKIPEDIA articles! The BSAC London Branch is the original branch No.1 of the British Sub-Aqua Club. The branch continues as an active, member driven club to train and undertake scuba diving within the UK and around the world. The branch is currently located in the basement of the Seymour Leisure Centre in Marylebone, central London. The branch meets weekly at 7.30pm on Tuesdays and retires to the Harcourt Arms nearby after training or playing Octopush in the swimming pool.