There are a wide variety of steps; some of which fold up whereas others don’t, there are steps with handles on and some without, some steps are more suitable for one than others.
Keywords (to search): step, step stool, chair, footstool, stepladder.
IKEA
Forsiktig; £2.50, non-folding
Bolmen; £4.50, non-folding
Trogen; £15, non-folding
ADDiS
Step Stool; £8.99, 240mm height
*Can also be found in black at Wilko for £5.00*
AMAZON
Small Folding Step Stool; £5.85, 220mm height
Large Folding Step Stool; £8.01, 370mm height
ARGOS
Chrome Step Stool; £19.99
COMPLETE CARE SHOP*
Aluminium Bath Step; £19.95, 200 – 260mm height
Metal Step Stool; £19.95, 240mm height
Bath Step Stool with Handrail; £34.95, 260mm
Bath Step; £16.95, 100mm