Rugby in Cardiff Welsh international Jamie Roberts. Another side, Cardiff Internationals Athletic Club normally shortened to CIACS (pronounced "kayaks") were formed in the docks area of the city, known as Tiger Bay in 1946. CIACS has always reflected the multicultural nature of the docks area, hence the name Cardiff Internationals. The club is best known for having produced Billy Boston, who went on to become a rugby league footballer in the 1950s. The club represents the Grangetown, Cardiff Bay, Butetown and the Docks areas. There are many other recreational non-affiliated sides playing in the city, including Cardiff Bus RFC, players being employees of
Cardiff Urban Area almost 37% on the 2001 population of 327,706 this was mainly due to Caerphilly and Pontypridd becoming part of the built-up area. The population of the Cardiff unitary authority (not co-terminous with the built-up area or the wider urban area) in 2001 was 305,353. Cardiff Council estimated the population of the unitary authority at 317,500 in 2006, as of the 2011 census it was 346,090. According to the ONS definition the Cardiff Urban Area had the following subdivisions: Notes: Cardiff Urban Area The Cardiff Built-up Area or Cardiff Urban Area is the name given to the urban area around Cardiff.