The Equality Act currently covers sexual harassment in the workplace - but outside work, prosecutors must use different pieces of legislation, depending on the nature of the offence. Critics say this leaves us without a proper definition of the types of behaviour that amount to sexual harassment - or clear boundaries. It also makes it near impossible to get an accurate picture of the scale of the problem.
The Oxford English Dictionary defines sexual harassment as "unwanted sexual advances, obscene remarks, etc". And the Equality Act 2010 says it's an "unwanted conduct of a sexual nature" which violates a person's dignity or "creates an intimidating, hostile, degrading or offensive environment".