Their introduction saw the withdrawal of the last of Glasgow's old Class 303 "Blue Train" trains which had been in service since 1960.
Although delivered to Strathclyde in 1999-2002, they did not enter passenger service until 2001 due to a large number of problems (like other newly delivered Juniper trains) and technical issues which plagued the new units at their introduction.
SPT had ordered 38 Juniper units originally, but two were added to the order as a goodwill gesture, because of these problems.

SPT purchased a total of 40 units, although only paying for 38 of the units (2 were given free, with the reason stated above) which can be seen in use daily across the SPT electric network.
On the first running of the units, 334010 and 334020 ran to Gourock.
Initially the units ran Ayrshire Coast Line and Inverclyde Line services but then become a common sight on the Argyle Line and North Clyde Line.

In December 2010, the Class 334s operated the Ayrshire Coast Line, Inverclyde Line, North Clyde Line and Argyle Line.

By June 2011 the class was substantially replaced by the Class 380 units on the Ayrshire Coast Line and Inverclyde lines, with only occasional units seen on those routes, to be refurbished.
Their introduction saw the withdrawal of the last of Glasgow's old Class 303 "Blue Train" trains which had been in service since 1960. Although delivered to Strathclyde in 1999-2002, they did not enter passenger service until 2001 due to a large number of problems (like other newly delivered Juniper trains) and technical issues which plagued the new units at their introduction. SPT had ordered 38 Juniper units originally, but two were added to the order as a goodwill gesture, because of these problems.
SPT purchased a total of 40 units, although only paying for 38 of the units (2 were given free, with the reason stated above) which can be seen in use daily across the SPT electric network. On the first running of the units, 334010 and 334020 ran to Gourock. Initially the units ran Ayrshire Coast Line and Inverclyde Line services but then become a common sight on the Argyle Line and North Clyde Line.
In December 2010, the Class 334s operated the Ayrshire Coast Line, Inverclyde Line, North Clyde Line and Argyle Line.
By June 2011 the class was substantially replaced by the Class 380 units on the Ayrshire Coast Line and Inverclyde lines, with only occasional units seen on those routes, to be refurbished.
British Rail Class 334