Vintage single wooden bedstead (Manchester Chorlton M21)

Vintage single wooden/metal bedstead that can convert to a sofa with a detachable wooden back along one side of its length.
Dimensions: Frame length 190, width 70 cm, height (cornerposts) 80 cm. Bedbase 182, width 63, height from floor 32 cm. Will take mattress length 183, width 76 cm.
More suitable for a child, because bed is relatively narrow, and also low off the floor. The existing mattress is an old foam one that would not confirm to fire safety regulations, so would need to be replaced.