Around 1,000 servicemen and women will march through Cardiff later to mark Armed Forces Day. The day celebrates the work of all military personnel past and present.
The March through the Welsh capital will coincide with the 70th anniversary of the start of the Battle of the Atlantic. It was the longest continuous military campaign of the second world war.
After the march, Coopers Field in Bute Park, Cardiff, will play host to various events such as musical performances by the Commando Training Centre Band of the Royal Marines supported by the South Wales Police Band.
There will also be displays by the Royal Signals motorcycle display team, the "RAF Falcons" Parachute Display Team and a fly-past by an RAF Sea King helicopter.
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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.
There is likely to be a good deal of cloud around today, thickest in the southeast, where outbreaks of rain are possible at times.