British Amateur Telivision Club
The following is taken from the BATC website:
The BATC was founded in 1949 to promote our hobby of Amateur Television (ATV) and is the largest such specialist organization in the world with 15% of our members living outside the UK. We are a non profit organisation and the club is run by its members on a voluntary basis. The club covers all aspects of Television from making and editing programmes to transmitting television on the amateur radio bands.