GPS tech (Garmin, Hammerhead, Wahoo, RWGPS, etc)

Ha ha sorry Soul I read hers first. Although to be fair you've done all the work for me mate!!

Yeah how would I see the route which I'm on though? Would it just all be blank with lines throughout as I haven't got maps?

No worries....

Without the maps, you'd just get an orange background and the pink like which is your route. It would still beep every time you have to make a turn and show you which direction and as long as you keep it zoomed to around the 80-150m mark, it wouldn't be an issue.

It is, however, worth picking up the maps as if you get lost, they are great for finding the nearest pub / cashpoint / petrol station etc etc.