Andy Sandell came off the bench for the Exiles in the second half to score the only goal of the game. Portsmouth 0-1 Newport (FT).
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Charities in Wales say thousands of low-income families with disabled children could be missing out on grants, because of government cuts.
Tuesday will have a murky start with widespread fog, mist and low cloud.
A plan to secure the future of Port Talbot steelworks will be unveiled to staff on Wednesday, ITV News understands.