Analytics firm Experian Hitwise's latest figures confirm that the Specific Media service is now less popular than Stumble Upon and Moshi Monsters in the territory.
"Myspace traffic has been on the decline for at least three years now but this is the first time the social network has fallen out of the Experian Hitwise top ten," said Hitwise's James Murray.
"In its place, Stumble Upon has risen in the rankings and is now the UK's tenth most popular social network.
"As the social media landscape continues to evolve, brands need to be aware of the fast moving trends and which social sites people are visiting"
Facebook is the most popular social network in the UK, claiming more than 52% of the market in November. Tenth placed Stumble Upon holds just 0.36%.
Google's Google+ also failed to break into the top ten, but Hitwise notes that 91.07% of the UK's search engine traffic comes from the firm's site. Bing came in second with 3.84%.
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Experian Hitwise's top ten UK social networks list in full is as follows:
4. Yahoo Answers
9. Moshi Monsters
10. Stumble Upon