Thought I'd start a thread as these codes get lost in the main thread.
I'll start, here is my link for both of us to get £10 off.
www.cornerstone.co.uk/7ama0063
You can stop the plan after you receive your first delivery. You can pause your plan, or you can delay delivery on subsequent orders.
I just go on every 6 weeks or so and do a one off order for more blades.