The new figures, published by the Fostering Network, show the scale of the challenge for fostering services in the region as they struggle to provide the right foster homes for all the children who need them.
Since 2008 the number of children living with foster families in England has risen by 16 per cent, and is continuing to rise.
There is also an ageing foster carer population and around 14 per cent of the workforce retire or leave every year.
Without these extra families, too many children will have to settle for second best.
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This might mean living with a foster carer who is a long way from the child’s home, school and family, or who does not have space for their brothers and sisters, or even living in residential care when fostering has been identified as the right option.
Helen Clarke, recruitment and retention expert at the Fostering Network, said: “All children in care need a family they can grow up with who can love them, be ambitious for them and help them achieve their potential. For a growing number, foster care is the best option.
“By becoming a foster carer people can help the children they welcome into their homes to have the best possible opportunity of a positive future, to do well at school and be successful in later life.
“Foster carers come from all walks of life, from teachers to factory workers and builders to nurses. If you want to work with children and have the right skills to foster, then finding out how you can make a real difference to children across the south east could be a great start to the new year.”
To find out more about becoming a foster carer people should contact their local fostering service. They can also visit www.couldyoufoster.org.uk or call Fosterline on 0800 040 7675.