There was a whole fleet of vintage yachts with "Welsh ..." in the 80s. Many of those yachts sank later unfortunately.

Don't believe half of the so-called Churchill connection.

AMAZONE was built by Thornycroft, Southampton in 1936 for Captain-Commander Léon Andrien H M J G Hemeleers-Shenley, Assistant Military Attaché at the Belgian Embassy, allegedly at his wife Una's behest and with her money. By 1939 the yacht was laid up at Thornycroft with ownership in dispute between the couple. He fired her favourite yacht-master, at which she re-appointed him, but he was able to resist his wife's legal claim for posession of the yacht by successfully claiming diplomatic immunity.

It seems that the Antwerp-registered yacht remained in the shipyard until 1940 when she was hired by the Admiralty.

That's a much more juicy story than the nonsense about her belonging to Churchill.
http://evegdphotoart.overblog.com/2016/08/il-est-toujours-la-le-yacht-amazone.html
(the photo of Churchill in naval uniform was taken at Safi, Morocco in 1959 on the launch of Aristotle Onassis's yacht CHRISTINA)

As you'll see from that link she was for sale in January 2016 so I suspect that she was placed on the market well before then. She was extensively overhauled in 2005, but I'm sure she'd need lots of work if she were to ever be restored of sailing condition.

I think it's "Welsh Liberty" - still current but restored to a more original appearance:
https://www.ybw.com/news-from-yachting-boating-world/luxury-yacht-linked-to-churchill-and-wwii-battle-on-sale-for-e2m-16540

https://www.yachting-pages.com/superyacht_news/winston-churchills-yacht-listed-for-sale.html

Brgds
Phil

The symbol on the funnel is that of a Welsh Dragon and the first part of the name written on the bridge board looks like it could be "Welsh"

Brgds
Phil