Presenter biographies: M to O

After qualifying as a doctor in 1982 from Bristol University, Trisha worked in a variety of NHS hospital specialities. Training first as an anaesthetist, she then gained experience in haematology (diseases of the blood system), respiratory medicine (especially asthma and chronic bronchitis), cardiac medicine, renal medicine (working on a kidney dialysis unit), intensive care medicine, and general emergency medicine.

She now works part-time as a freelance medical journalist and broadcaster, writing for both the medical profession and the general public. She has a Master's degree in medical ethics and medical law.

Particular interests include women's health issues, infectious diseases, migraine and headache-related problems, obesity and weight loss, and the health/medical aspects of beauty treatments and cosmetic surgery. As a director of a charity providing independent supported living, Trisha has recently become involved in the issues facing people with severe learning disabilities and mental health problems.

Jack is co-founder of Fathers Direct, the national information centre on fatherhood, where he has helped develop websites and magazines for dads.

Father of two children, Jack co-authored He's Having A Baby, published alongside the BBC TV series.

A former associate editor of The Independent, he is a frequent broadcaster and writes regularly for the national press.