June 20 (Reuters) - Serco Group Plc SRP.L :
* Serco signs 1.5 billion stg contract for New Grafton Correctional Centre
* Has signed contract and completed financial agreements to operate New Grafton Correctional Centre (NGCC) in New South Wales, Australia
* Serco's contract for operation is expected to commence in 2020
* Estimated total contract value to Serco over a 20-year term is approximately A$2.6 billion Source text for Eikon: ID:nRST5649Ia Further company coverage: SRP.L
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