Further information from Jack May below. They clearly have been around for a few years.

Regards,

Then let me send photos of some Tatra Yug cars. Here's a link (with photo) that may be interesting. https://www.railwaygazette.com/modes/latest-tatra-yug-tram-tested-in-kamianske/45558.article https://www.railwaygazette.com/modes/latest-tatra-yug-tram-tested-in-kamianske/45558.article

The four attachments are digitized slides I took of Tatra Yug K1 cars in four Ukrainian cities on my 2017 trip. They were all built between 2007 and 2014. I saw an articulated version (K1M) in Odessa, but did not get a good photo (I could send it if you want).

Jack