If you have a phone that can add Apps then all you will need for spot fixing your position is an app from the Ordnance survey called OS Locate. Its fast and accurate and you won’t need a separate gadget, batteries or charger. You can download it today and give it a trial run. If you don’t like it then the etrex is the option.

"I don't have a smartphone (nor do I see the need for one, given my quiet lifestyle)". Well M if you did have one you wouldn’t need a GPS. And its still basically just a phone with a few extra bits. Technology is the way forward and some phone satellite sensors are better than some stand alone GPS which is pretty sickening when you consider how much mapping GPS’s cost. It’s worth considering. Go on you know you want to. The other M could set it all up for you while he’s having a wee break. (No pun intended).