I posted a useless fact, but it doesn't seem to have got there. It was about (and appears to disappeared into) the Morley Triangle.
Apparently about 90% of the Worlds's commercially produced Rhubarb is grown in an area to the Southern side of Leeds, between there and Wakefield (West Riding of Yorkshire).
The group Cockersdale, formed by the late Keith Marsden (Bring us a Barrel) took their name from a valley at the western end of this area. I have walked on footpaths through farm fields of Rhubarb in Cockersdale.
Quack!
GtD.