The children have not been missing before and although they have packed clothes and taken money we are very concerned about them, particularly in this cold weather. It is believed they have left on their own accord.
We are continuing to carry out a number of enquiries to try and locate Sophie and Jack and are being supported by a significant number of force resources.
We are now appealing to the public to help us with this search - if you have seen either of the children today or have any information about where they may be, please contact us immediately.
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Residents are to be evacuated from a tower block in Camden, north London, to allow "urgent fire safety works" to take place.
Rain in places tonight. Turning windy overnight.