Since the clocks went back i really needed a new rear light for cycling home from work. Found this on evanscycles and i think it's a bit of a bargin. these are really good lights and at £5.99 with free delivery you cant go wrong. Hope this is of some use to people.
This is a really This ultra compact LED rear light features a 360 design which increases all-round visibility and a super high powered red LED. Operates in either flashing or constant modes. Batteries included