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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Details of the road closures and train delays ahead of Ed Sheeran's concert over the next four evenings.
Temperatures will not be quite as high as the last few days but it will still feel warm in the sunshine.
There will be a fresher feel with temperatures falling lower than on recent nights.