Police in Manchester have said they will begin recording offences against members of alternative subcultures in the same way they do attacks based on race, religion, disability, sexual orientation or transgender identity.

The Greater Manchester police force – the first in Britain to take the step – said that "goths, emos, punks and metallers" and members of other alternative groups have often endured abuse.

"People who wish to express their alternative sub-culture identity freely should not have to tolerate hate crime," Assistant Chief Constable Garry Shewan said.

Manchester police said the change would enable officers to give more support to victims of anti-punk or anti-Goth crime. But it won't necessarily mean tougher sentences.

Although British judicial guidelines call for people convicted of hate crimes to receive tougher sentences, the Manchester decision has not been recognised nationally.

The police decision follows campaigning by the Sophie Lancaster Foundation, a charity set up in memory of a 20-year-old who was fatally attacked in a park near Manchester in 2007 because of her appearance.

The judge at the trial of the five teenage attackers called the assault on Lancaster and her boyfriend a hate crime.

The foundation is campaigning to get hate crime laws expanded to include "alternative subcultures or lifestyle and dress" and has gained support from musicians including Gary Numan and Courtney Love.

The victim's mother, Sylvia Lancaster, said the police move was "a validation of the work we have undertaken in the past five years and hopefully other forces will follow [Manchester police's] lead."

There are no immediate plans to change the national hate crimes register, but last year equalities minister Lynne Featherstone acknowledged that the five recognised categories of hate crime was "an incomplete list."