Following the announcement today by Prime Minister Boris Johnson, the Government has confirmed that hairdressers in England can reopen from 4th July.
The Government do not differentiate between sectors: freelance hairdressers and salons are grouped together.
The official Government guidelines for hairdressers in England, including freelancers and mobile hairdressers, are now available: https://www.gov.uk/guidance/working-safely-during-coronavirus-covid-19/close-contact-services