Network Rail has withdrawn the use of hydraulic hoists after three workers were injured in a fall (link below.)
http://news.bbc.co.uk/1/hi/england/essex/7476178.stm

The workers were repairing overhead cables on the Norwich to London line when they fell up to 20ft (6m) from an elevated platform on 11 June.

The Rail Maritime and Transport union had called on the firm to withdraw the hoists pending an investigation into the accident near Ingatestone, Essex.

Network Rail said the hoists will not be used until the inquiry concludes.