It is less than a year since US electricals giant Best Buy planted its flag in this country in partnership with Carphone Warehouse with its first big-box store in Thurrock.

It is less than a year since US electricals giant Best Buy planted its flag in this country in partnership with Carphone Warehouse with its first big-box store in Thurrock.

But over that time the Star-Spangled Banner has been taken down and the Union Jack run up in its place. The volume of management turnover at Best Buy Europe has been phenomenal - and it has been those most associated with the US approach that have been departing.

In the past 10 days alone, Scott Wheway, the highly regarded former Tesco and Boots director, handed leadership of the business to Carphone veteran Andrew Harrison, and it emerged that the marketing and commercial directors are also leaving.

Wheway will continue to work for Best Buy Inc but the elevation of Harrison - nicknamed ‘Stat’ for his mastery of the business’s metrics - effectively marks a handover of operational power to the UK.

Harrison has played a pivotal role in developing Carphone’s Connected World strategy, which certainly clicks with consumers in the digital era. His new responsibilities are likely to mean that approach becomes even stronger, rather than reliance on the novelty of the Best Buy name and its reputation.

The travails of Best Buy do not give established rivals cause for complacency. As they know, Carphone is a formidable competitor and its influence over Best Buy’s development from now on will probably increase competitive pressures. But don’t be surprised to see less emphasis on the big-box format. It always looked a difficult route to market, given the established presence of the market leader, Dixons.

Wheway himself hinted last week that the future of Best Buy might lie in a different direction when he professed delight that rivals only view it through the “narrow lens” of the sheds rather than as a multi-channel and smaller-store business, too. While there was plenty of noise around the big-box openings, the real battle may yet be played out elsewhere.