As you might expect there's quite a few guitar courses to be found online - but the one we've featured here is the one Mark Knopfler recommends - so that's clinched it.

Free beginners guitar course from Justin Guitar (for younger musicians - visit Kids Guitar Lessons)

"My beginner guitar course is fun, fast and free - over 100 lessons and 244 songs! You'll learn all the basic chords, strumming and techniques - and loads of songs! Millions have learned to play using my courses and hope you will too!"