(16 Sep 2013, 6:35 am)Daniel wrote I believe only 24 - these are the examples that have been completely refurbished also... See here for details on refurbishment.

As part of the same upgrade, 27 class 175 trains were upgraded - as were 8 single carriage class 153 trains.
This work started in the back end of 2010, and was completed by summer 2012.

Good video, its a shame more trains do not have plug sockets and its a shame that these 158 classes only have plug sockets at a table