TPB 51001 appears to be OOU at VolkerRail Frodingham TMD. The nameplate CHARLIE appears to have been transferred to another machine which resides within Scunthorpe Steelworks - said machine appears not to carry a number of any sort, only the VR black/white colour scheme - this could be TPB 51031 but not 100% certain?
I had a good look over this impressive machine at Smalmstown yesterday. It is presently there pending certification and type approval, which I was told is hopefully in a few weeks time.
It is a Ballast Undercutter and was fabricated/assembled by Stobarts themselves. Although I understand Stobarts built it at Kingstown, it appears that certain key components were manufactured by third parties specialist in such components. As well as a Perkins engine and the aforementioned GOS crawler tracks and rail wheels (although I would add there is currently nothing on the machine to indicate GOS manufacture although it appears a reasonable bet) plus radiator and air pumps carrying details of their manufacturer, the only works plate I could find related to a retractable three step ladder leading to the cab! No main builders plates appear to be carried and I was told these will be fitted on certification being completed.
There is nothing to indicate parts have been recycled from the old Gophers and indeed although clearly non-runners and incomplete, DR76001 and DR76003 didnít appear much different to when I had previously visited in 2015.
However I am not sure that it should be regarded as a small machine. It is substantial and as a rough estimate at least 25% longer than the current Gophers. The large crawler track set is under approximately 50% of the machine, the remainder being suspended in mid air including the large cab on the front end. Some photos will be submitted when I return South early next week.
Worth mentioning that this machine has covered some significant ground on the Brighton Mainline this weekend, unusual for the South East. Having been delivered to Snow Hill AP at Patcham, Waterhall, from what I observed it has spent two days with trailers 3301/3302 either side moving power supply upgrade materials from Hassocks to various sub-stations and electrical installations. Yesterday morning, I believe it went as far north as the sub-station north of Rocky Lane overbridge south of Haywards Heath, being some 12 miles or so from where it was on tracked by my calculations.