Two lanes are now closed on the M4 eastbound in between J20 and J19 and there's queueing traffic after an accident involving multiple vehicle.
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Charles Howeson has been sentenced to seven years and six months for historic sexual offences against eight young men between 1985 - 1994.
The heatwave will culminate next Wednesday, which forecasters say could be the hottest day of 2018.
The Prince of Wales and Duchess of Cornwall visited the city in an attempt to encourage tourists to visit.