A jumbo jet carrying a 138 passengers made an emergency landing at Cardiff Airport this morning.
The 747 aircraft developed a suspected technical problem as it flew from Houston to Heathrow, as Nicola Hendy reports.
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The heaviest bursts are expected in the south and east, with some western areas either remaining dry or becoming dry by dawn.
Many places will start dry, but rain in the southeast will spread to most for a time overnight.
The family of Isaac Nash who went missing after being swept out to sea last summer have presented a cheque for £10,000 to the RNLI.