nottinghamthe topping chair I have been a midwife for 34 years , I live in Nottinghamshire . Since i retired early due to osteoarthritis of my knees i have developed the topping cair aimed... I have been a midwife for 34 years , I live in Nottinghamshire . Since i retired early due to osteoarthritis of my knees i have developed the topping cair aimed at preventing knee damage for occupations/professions who are required to kneel or squat to deliver care such as midwives ,nurses, physio,s...