Membership of the BTS is similarly a "must" and their website is comprehensive, including links to numerous guidelines.
Meetings are typically held twice a year, the Summer meeting sited outwith London (and often particularly educationally slanted and thus particularly good for those in training) and the Winter meeting, held in London.
Membership of the STS is highly recommended, providing an opportunity to network with colleagues, and a friendly forum to learn and hopefully present your own data. The society is particularly keen to welcome students, and colleagues in professions allied to medicine.
Meetings are held once a year.