Thank you for the apologies Weaver, very much appreciated. I don't know much about 4G but at the time I'd done some research due to your BB issues and I could clearly see it would most likely perform better than what you have and certainly be cheaper. I also figured that in a low population area you shouldn't be too congested.
I've been with Three for a long time, having the original One Plan many year's ago, I've always used my phone on holiday for tethering, sometimes reception was bad but over the years it's generally improved. Due to a WiFi issue at home I now always use 4G on my phone although I'm very close to the cell tower.
Unless you really try you'll never know, and a proper external directional antenna will vastly improve things.