A BBC presenter claimed an angry passenger told him to take off his mask while travelling on the London Underground.
The newsreader, 59, told how the passenger was offended by the Welsh flag design decorated with the iconic red dragon.
Alongside the antidote, he shared a photograph of himself appearing unimpressed.
Huw explained how he still plans to wear a face covering on public transport after July 19 when they will no longer be a legal requirement.
Taking to Twitter, the journalist said: “Angry man on tube demands I take off mask.”
Explaining what riled the fellow train traveller, he added: “Turns out he was offended by the Welsh theme.
“Anyway. I’m still going to wear a mask on public transport and indoor spaces to protect others and show respect for NHS staff.”
Signing off in Welsh, the broadcaster added “diolch” or thanks.
The broadcaster’s most recent remarks have been shared more than 2,500 times on social media with many users tweeting photos of their own Welsh masks in solidarity.
Among the sea of comments, one person said: “Sadly there will be more and more incidents like this, with or without the Welsh theme. I personally love your mask Huw.”
While another opposed: “To protect others? Are you ill? Then you should be home isolating. I think NHS prefers decent pay and working condition rather than just you wearing a mask. Don’t get me wrong, wear it if you wish but be realistic with your comments.”
Expressing a more political view of the conundrum, another tweeted: “It is obvious now that the English do not consider either the Welsh or the Scots to be their equals. It is time for the Union to end.”
The wearing of face masks will no longer be a legal requirement in England from July 19.
National rail and bus operators have confirmed they will not require passengers to wear masks however they will remain mandatory on Transport for London (TfL) services.
Without national backing, Mayor of London Sadiq Khan asked TfL to make face coverings a “condition of carriage” on all its services unless people are exempt.
The requirement would mean passengers on the Tube, bus, tram, Docklands Light Railway, Overground and TfL Rail, would need to continue to wear a face covering in stations and for the duration of their journey.
However, Mr Khan described the decision as “an imperfect solution” and said he is working on passing a bylaw to make it a law too.