Hi Oscar,
British locos tend not to use so much sand as they do in US, consequently we don't have sanding towers over here, but our sand (more of a whitish sand/silica mixture) is bagged and just simply poured into the loco's sand boxes.
Here's a photo of Freightliners Ipswich Fuelling Point which also maintains class 86 and 90 freight locomotives pantographs and therefore plenty of opportunity to shunt 'dead' electric locos!
Good luck!
Dave.
British locos tend not to use so much sand as they do in US, consequently we don't have sanding towers over here, but our sand (more of a whitish sand/silica mixture) is bagged and just simply poured into the loco's sand boxes.
Here's a photo of Freightliners Ipswich Fuelling Point which also maintains class 86 and 90 freight locomotives pantographs and therefore plenty of opportunity to shunt 'dead' electric locos!

Good luck!
Dave.