Only risk off lead if you are in an area from which your dog cannot escape.
If you want a different class, log onto Dogpages and ask. There is bound to be someoen from your area with a class to recommend.
I'm not happy with retractable leads, having cut my hand with one and hearing of thier unreliability, but Pets at Home now stock training leads (ie extra long ones) made by Halti. They are a nice soft fabric and come in various lengths. One of mine can be a long lead, a normal lead for one or two dogs, as well as having clips so you can tie your dog to your waist.
Barbara, Monty, Joly and Teddy.