Morrisons have 3 types of scents from the Naturals Fabric Conditioner range. Currently on offer at £1. Normally £1.89. Some of the bottles have an "INSTANT REEDEM" tagged coupon around the bottle neck, worth £1 off ANY item in the Naturals range.
I used all of these on the bottles I bought so they cost me NOTHING.
But some checkout operators may be difficult about it - but worth trying. Morrisons still get £1 for reedeming the voucher.
Not sure when promotion ends so assuming it is the end of the month.
People are commenting that the voucher is for Persil not Comfort. So be warned