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This consists of 6 bottles of 450ml. With the S&S and the 10% voucher, it comes down to £12/£11.25, which is £2/£1.875 per bottle.
If you do not want to buy in bulk, then this is available for £2.5 in Boots and for £2.35 in Tesco with clubcard.
If you do not want to buy in bulk, then this is available for £2.5 in Boots and for £2.35 in Tesco with clubcard.