Fold down bed (Walberton BN18)

Fold down bed, useful for occasional guest. Mattress is thin (presumably to save space when folded) so we have used it with a second mattress from a similar bed, though this second mattress is no longer in a good state. When folded up the bed measures: height 1020mm; width 690mm; depth 180mm. When opened out for use, the bed measures: 890mm long; 690mm wide; 290mm from the floor.