With cases of scarlet fever skyrocketing by up to 300 per cent in certain parts of the UK – knowing the early warning signs of the bacterial illness is essential. Here’s what to look out for and when to contact a GPWith cases of scarlet fever skyrocketing by up to 300 per cent in certain parts of the UK – knowing the early warning signs of the bacterial illness is essential. Here’s what to look out for and when to contact a GP