I tested 9 popular sore throat remedies – the best eased my symptoms in seconds and the effects lasted 4 hours

WHEN I feel a sore throat coming, I just know I'm going to get ill. It starts with a light tickle then develops into an agonising scratchiness that makes it painful to swallow. This can last for days on end before my other inevitable symptoms - coughing, a headache and a fever - arrive. But...