Just popped to Tesco Broughton to see if they had the Moto G 4G instore (they didn't) and while in the phone shop noticed a reduced to clear pair of Jabra sports earphones down from £20 to £5, underneath was the bluetooth clipper version reduced from £40 to £10.
It is a small clip that acts as the bluetooth headset coupled with some Jabra earphones with a standard 3.5mm jack, so you could use your own.
They get 3-4 star reviews everywhere and that was at the original price, I was in the market for some Bluetooth earphones anyway so this was a bargain.
£29.99 on amazon http://www.amazon.co.uk/Jabra-Clipper-Bluetooth-Stereo-Headset-Black/dp/B003D24Z1M/ref=sr_1_2?ie=UTF8&qid=1403788602&sr=8-2&keywords=jabra+clipper
There was a good 20 on the shelf still in both black and white, this deal could be nationwide.
Apologies for the blurry image, this is one of the reasons I need a new phone (I know the camera is naff but better than the busted up iPhone 3GS I'm currently running)