Membership or course by course?

You take
One by one
With membership
You save
1 course
£120
£320
—
2 courses
£240
£320
—
3 courses
£360
£320
£40
5 courses
£600
£320
£280
10 courses
£1,200
£320
£880
20 courses
£2,400
£320
£2,080