Microsoft's Windows Phone 7 platform is now outselling Symbian handsets in the UK for the first time, according to figures from research firm Kantar Worldpanel.
However, the figures also show that Windows Phone 7 still represents only a tiny fraction of the smartphone market, and has a long way to go to catch up with sales of Android and Apple iPhone devices.
The latest figures are for the 12-week period ending 19 February 2012, and show that RIM, Symbian and Samsung's Bada platform all suffered a decline in UK market share based on the same period a year ago.
In contrast, Android, iOS and Windows Phone 7 all increased their market share, although in Microsoft's case this was starting from almost nothing (0.5 per cent) and has grown to just 2.5 per cent.
This was enough to beat Symbian, however, which crashed from representing a 12.4 per cent share of all handsets sold a year ago to just 2.4 per cent now, according to Kantar Worldpanel's figures.
Perhaps this is not too surprising, since it is a year ago since Nokia announced its intention to switch to Windows Phone 7 for its high-end smartphones, relegating Symbian to lower-cost handsets, which are not included in these figures.
Also, according to Kantar Worldpanel, a massive 87 per cent of the Windows Phone 7 sales can be attributed to just a single handset, the Nokia Lumia 800.
The firm put a positive spin on the results, saying that it is strong evidence that Windows Phone 7 is starting to make an impact on the European smartphone market.
"The fact that WP7 sales have overtaken Symbian based on one handset is encouraging," said Dominic Sunnebo, global consumer insight director for Kantar Worldpanel.
"However, Nokia will need to expand the range quickly in order to keep up with the slew of next generation competitor products being launched in quarter two."
But the scale of the task that faces Nokia is illustrated by the fact that Android alone now represents nearly half of the UK smartphone market, increasing its share from 37.8 per cent to 48.5 per cent since last year.
Apple's iOS is in second place, increasing its share from 22.7 per cent to 28.7 per cent, while third place RIM saw its share fall from 24.4 per cent to 17.1 per cent.
In the UK, smartphones made up 73.2 per cent of all handset sales over the 12 weeks, according to the firm.
Insecticides based on sulfoxaflor might be as bad for bees as neonicotinoids
Intel teases forthcoming new graphics card accompanied by the text "We will set our graphics free"
Think your password manager is completely secure? Think again...
ARM plans 7nm 'Deimos' for 2019 and 5nm and 7nm 'Hercules' for 2020