Traffic has returned to normal and the road has been cleared after an accident on the A48 at the M4 J28 / A4072 (Tredegar Park).
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Temperatures will tumble under clear skies tonight with a widespread frost developing.
Police found more than 20 cannabis plants, a small amount of cocaine and a prohibited stun-gun at the home of Richard Williams.
Finance Secretary Mark Drakeford and his Scottish and Northern Irish counterparts demand no further public spending cuts in the UK Budget.