One lane is blocked after an accident on the A4232 inbound at the A48 Cowbridge Road West / A4050 Port Road (Culver House Cross).
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It should turn cloudier through the early hours with some patchy drizzle and some hill fog too.
It will be a breezy day with variable amounts of cloud and some bright or sunny spells.
RAF veteran Andy Davies says the Royal British Legion helped him get back on his feet after problems with alcohol.