Jeremy Clarkson has revealed he underwent a heart procedure after a “sudden deterioration” in his health.

The 64-year-old said a swim on holiday appeared to cause him difficulties using stairs, with symptoms worsening when he returned to the UK.

Clarkson told The Sunday Times he felt “clammy”, a “tightness in my chest” and “pins and needles in my left arm”.

The former Top Gear host said he went to see his doctor after hearing about Alex Salmond’s sudden death last weekend.

He…