Former Dragons' Den star Richard Farleigh told Daybreak he views foster care as "society's band-aid".
Farleigh, who was taken into foster care at an early age, said fostering "repairs cases and puts children back into society".
He said being fostered "completely changed my life":
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In some cases, victims of violence and other serious crimes face long delays as forces are unable to dispatch officers promptly.
Mr Corbyn will highlight increases of almost 6% in council tax bills across the country.
The government has a stranglehold on the Damascus suburb after taking control of 70% of the area in a month of ferocious fighting.