Last night, I noticed on the Wigmore Hall YouTube channel the results of an International String Quartet Competition. This was strange, because although I was familiar with the trienniel Banff Competition I was unaware of this competition, which predates it. The Competition started in 1979 in Portsmouth (the Takács Quartet won), and moved to London in 1988. It only arrived at Wigmore Hall in 2010. So perhaps the 3 rebrands made me less aware of it.
From the Competition's wikipedia page I learned that
twelve [quartets] are selected to take part in the competition.