To all those on here who think it’s OK to rely on a technology to make up for lake of equipment or skill, it’s time to wake up!
GPS’s are great tools, but they can and do fail. I’ve had batteries fail well before they should, supposedly waterproof GPS fill up with water (quite comical at the time, on a night time search – fortunately I knew the area well, & had map & compass), also a broken screen. A light of some sort is also kind of handy. I once went on a rescue for a mountain biker who was stuck on the high fells after dark after a mechanical issue. Said he didn’t need to carry a torch as he could move much faster than a walker…… Best to remember that if your bike lets you down you really are just a walker. Oh, if you get injured you really need the same kit that a walker would be expected to carry.
Mountain bikes are great in wild places, but take responsibility for yourself and your actions. Rant over!!