Though the trees are still covered in plenty of leaves, various RHTT (Rail Head Treatment Trains) are already in operation around the rail network. This one is 3J01, working from Willesden to Macclesfield along the down slow line at Old Linslade at 11:29 on Saturday 20th October 2012, jetting the track as it travels. 66138 is leading the train while 66232 brings up the rear. Digital Image No. GMPI12653.