The low-cost Raspberry Pi single board computer is being held up until the hardware has received the CE certification mark, according to the latest update from the Raspberry Pi Foundation.
However, the first 2,000 production boards have now arrived in the UK, and the organisation said it is working hard to get these CE marked as soon as possible.
The Raspberry Pi Foundation announced late on Wednesday that the two UK distributors for the £22 device - Farnell and RS Components - have both indicated that they are not willing to distribute the Raspberry Pi until it has passed its emissions tests and received its CE certification mark.
It had been intended that the first developer units would be sold without CE certification, which would be carried out in time for the education version to go on sale later this year.
While the Foundation said it is confident that even the uncased version will "meet category A requirements comfortably without modification", meaning that testing is largely just a formality, it may lead to further delays for those keen to start developing with the device.
The Foundation also said it is talking to the Department for Business, Innovation and Skills (BIS), to better understand the terms under which some other single board computers are permitted to ship to end users in the UK, despite the fact they may not have passed the CE certification tests.
The Raspberry Pi has been designed to be a 21st century successor to the famous BBC Micro of the 1980s, intended as a platform to boost IT developer skills among UK students.
Earlier this week, RS Components announced it was preparing a dedicated online store to sell the Raspberry Pi to consumers.
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