Prince Charles has unveiled a plaque at the restored and renamed Redhouse Town Hall in Merthyr Tydfil.
He told onlookers he is "very impressed" with the building.
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Warburton went off in the second half during the Six Nations clash after he took a blow to his knee.
David Cameron says this should be a day for people to celebrate 'all that embodies Wales'.
Rain moving east, will spread across Wales in the first half of the night, some likely heavy.