Found 28th Dec 2017
Picked up one of these in Homebase ,Coventry store today. Marked up on the shelf as £7 scanning at £3.50. No wiring needed with this one as it's solar powered with PIR. Around 6 left on the shelf but you can check the stock in your area on their website. Forgot to use the 15% off voucher though so you may get it for just under £3.