Whilst in Boots Farnborough (Queensmead) I noticed that a wide variety of shampoos were reduced to much lower prices, which I'll list below. There were still plenty there when I left. I also checked in Boots in Fleet, where I noticed some other ones reduced. Might be worth checking your local Boots!
The masks and leave in conditioners are very good deals for those that use them!
Herbal Essences Dazzling Shine shampoo - 59p
Herbal Essences Classics silk and shine shampoo - 95p
Herbal Essences seductively straight shampoo - 59p
Herbal Essences hello hydration shampoo - 59p
Herbal Essences Bee Strong shampoo - £1.58
Herbal Essences Bee Strong conditioner - 59p
Herbal Essences Bee Strong leave in conditioner - £1.20
Herbal Essences Bee Strong Bee Strong mask - £1.20
Herbal Essences Tousle Me Softly mask - £1.20
Boots Fruit Essence Moisture Repair conditioner - 38p
Boots Fruit Essence Goodbye Dry Ends Conditioner - 38p
Boots Fruit Essence Vibrant Colour shampoo - 38p
Boots Provitamin Intense Shine shampoo - 50p
Naked 2 in 1 shampoo (Toffee Apple/Banana & Custard/Jam Sandwiches) - 75p