Wensleydale track survey

We had something a little different down the branch this afternoon or rather it went up the branch last week but I only caught sight of the rear cab window as it disappeared out of view. We thought it odd that it didn’t return (usually most ‘trains’ go up the branch and return the same day). We have had quite a bit of works train traffic on Monday’s of late but much of it has been seen before so I haven’t posted any photos. 

They look to have been working their way back from Redmire surveying the branch because it had already passed our house on the way to Bedale when I became aware of it and popped up to take a look. 
By good fortune it had stopped a couple of hundred yards away and after marking up the ground, (when the machine made a series of loud beeps) it then reversed to about 20 yards beyond the house on the Redmire/Leyburn side. More beeps more marking up and it reversed direction again heading back off towards Bedale. 
I reckon it must be sat in the passing loop at Bedale station now, because just before 5pm we had the Class 20 featured previously, come past light engine heading to Leyburn/Redmire. 

For those it might interest, there are more details shots on my Flickr site