Just come to upload some routes onto my 705 and the maps not showing and i cant remember what it was called or find it on my pc again !!
What are people using ?

Try gmapsupp but that’s only from memory so may be wrong :(. As for what people are using, i used to build the maps myself using mkgmap bit i like what openmtbmap.org produces now

You should find what you need here http://talkytoaster.info/ukmaps.htm

What Butcher said^^

+1 for osm on talky toaster. I reckon that osm is better than the Garmin maps for the 705 most of the time.

http://openmtbmap.org/

Try this one, I use it on my 705.