Like most Underground lines, the Piccadilly line is operated by a single type of rolling stock. In this case it is the 1973 tube stock. The trains are painted in the standard London Underground livery of blue, white and red. Seventy-six trains out of a fleet of 88 are needed to run the line's peak service. One unit (166-566-366) was severely damaged by the terrorist attack of 7 July 2005. The stock was recently refurbished, and was due for replacement by 2014, but the order for new trains was cancelled in July 2010.