Hewlett-Packard has been ousted from the top of the UK PC market by arch enemies Dell and Acer after a torrid quarter in which its sales fell across all form factors.
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According to IDC preliminary results, total UK PC sales fell 7.2% to 2.5 million units in the second quarter, but this was better than 12.1% drop the analyst house had earlier forecast.
However HP, which recently parted with UK PSG boss David Wright, saw shipments fall more than three times the market average by 25.5%.
Split by platform, the industry heavyweight's sales fell 19.9% and 29.2% respectively in the desktop and notebook segments, ceding the top spot in the UK for the first time in nearly a year.
"HP was not consciously pushing mini notebooks and this is costing them market share," said Eszter Morvay, IDC research manager.
In the quarter, HP combined its professional and consumer PC businesses to cut costs and market watcher Gartner reckons this could also have resulted in some lost sales across EMEA.
More than 1.16m consumer portables were sold in the three months - making it by far the biggest sector but unlike rivals Dell and Acer, which grew 86.2% and 66.4% respectively on the back of deals with retailers, HP sales fell 14.6%.
Mini notebooks accounted for one third of this segment but HP had failed to aggressively compete in the burgeoning sector, said IDC.
Across all form factors, Dell declined close to the market rate at 7.3% and Acer posted growth of 36.7%. In fourth position, Toshiba sales fell 14% and Samsung grew 216% to hand it the fifth spot in terms of market share.
In the total UK market, only consumer notebooks posted growth at 30.6%, as business and retail desktops went down 24.5% each and professional notebook shipments fell 27%.
Morvay said the channel had been in a better position than the first quarter when it was "fully stocked" following the Christmas season so there was greater room for sales-in.
The rest of the year is likely to remain tough she added but HP will be hoping that Jos Brenkel, who runs PSG for the vendor in the Middle East, Mediterranean and Africa, will have a big impact when he oversees the UK PSG during the next three months.