Also Garnier anti dandruff shampoo £1

Go nearly bald like I'm now, and that solves the dandruff problems stone dead.

These Anti dandruff products are useless IMO. They never solve anything. Dandruff is caused by a fungal infection of the scalp and the best thing to destroy the infection is Colloidal silver in a hand pump spray onto the scalp after washing and drying the hair. Leave it on as long as possible. Spray more when it dries out. That will wipe it out and end dandruff. Much more effective than these useless Anti dandruff shampoos.