The driver, a 42-year-old female ambulance technician, and the patient, an 88-year-old man, were pronounced dead at the scene.
A male crew member and a male relative of the patient remain in hospital both in a serious condition.
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Rain becoming heavy at times this afternoon before clearing tonight. Dry with hazy sunshine tomorrow but feeling fresher.
Mild with cloud and patchy rain at times. Heavy rain this evening, then dry, bright and feeling fresher tomorrow.
More than 800 sailors died when two battleships, Repulse and the Prince of Wales, were sunk by the Japanese.