So you can receive 10% off from
Halfords &
CRC. Also a % off sis & Muc off products.
Say if you bought muc off from Halfords would you get a double discount?
What have you been buying with your B.C discounts?
Sadly not, and there have been many reports on here about inconsistent application of the BC discount at Halfords. Previously I've had it applied to pretty much everything I've bought from there, including stuff for the car.
Funnily enough, I was in there this very weekend, speaking to someone who has been there a couple of years and knows me.
He advised that they've scaled it right back to bikes / cycling goods only, and it
might not apply to price match / sale / reduced goods.
He then suggested it would depend who serves you, hinting perhaps that it might still be available in some instances...

(The discount is applied manually at the till and some staff struggle to work it out)
Still, I can't complain as I've had much, much more than my membership fee back in discounts in previous years.
They've also changed the Bike Care Plans and they're now only available on "Halfords bikes" when you could buy one for any bike previously - presumably this includes bikes bought from Cycle Republic and
Tredz, but you'd be as well to check if you're interested.
As for the Muc-Off discount, I can't recall an occasion where I've needed something and their online shop (with discount) has been cheaper than elsewhere.