Veho Muvi K2, Was £199.95 reduced to £123.98. Includes all required mounts and waterproof casing, a real GoPro alternative (from personal experience).
Records 1080p/60fps and takes 16mp pictures, fully controlled from iOS/Android app or device. Has an exceptionally good build quality, i'd liken it to a Hero3+ Silver on quality and image resolution. The waterproof casing is pretty rugged.
Obviously not as good as the Hero 4 Black for recording quality but price is much more appealing!
Price the same now at BT Shop and dabs, but I've chosen to post Amazon in this case as it's easier if you have Prime etc.