It was not immediately clear what caused the crash, but some witnesses said the weather at the time was treacherous.
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ConsThe company has set up an automatic renewal system. This can result in costs for you even though you are not using the service.
Urgent cases are being defined as any patient whose symptoms suggest they need treatment to start the same day or where there is a risk of deterioration if they aren't assessed, such as a child with a high fever and a rash, or a frail older person who has suddenly become confused.