Asthma, strong asthma-like symptoms or treatment for related illnesses within the last four years.
Chronic lung diseases such as emphysema, bronchiectasis or cystic fibrosis.
Spinal surgery (including internal fixation or fusion).
Recurrent lower back pain.
Bone or joint problems
Meniscectomy (knee cartilage operation) within the last year.
Lower limb fractures with internal fixation (metalwork) within the last year.
Loss of a limb.
Complete loss of a thumb or big toe.
Clubfoot (including past surgery).
Chronic joint diseases such as ankylosing spondylitis, psoriatic arthritis, rheumatoid arthritis or gout.
Reiter's disease within the last five years.
Chronic eye diseases such as glaucoma, keratoconus and retinitis pigmentosa.
Surgery for a squint within the last six months.
Corneal problems such as a corneal graft or recurrent corneal ulcers.
Loss or dislocation of an eye lens.
Cataract or cataract surgery.
Current perforation of ear drum.
Chronic ear diseases such as cholesteatoma.
Presence of eardrum 'grommets'.
Chronic abdominal diseases such as Crohn's disease or ulcerative colitis.
Kidney disorders such as polycystic kidney disease or kidney stones.
Donation of a kidney within the last two years.
Kidney disease within the last two years.
Epilepsy or more than one seizure or fit after the age of five.
Any seizure or fit within the last ten years.
An active skin disease such as eczema or widespread psoriasis.
Sickle Cell disease.
HIV seropositivity / AIDS.
Being a carrier of hepatitis B or hepatitis C.
Past history of leukaemia or malignant lymphoma. Must be disease, treatment and review free for five years.
Alcohol or drug dependence.
Post-traumatic stress disorder (PTSD).
Loss of spleen (splenectomy) .
Having received transplanted organs.
Severe allergic reactions or anaphylaxis requiring adrenaline injection.
Severe nut allergy.
Circulation problems such as Raynaud's phenomenon.
Diseases requiring long-term medication or replacement therapy.
Current pregnancy or childbirth within the last three months.