There is a BBC news article about Love Island and Firefighters that includes this from the ASA
"Earlier this year, the Advertising Standards Agency (ASA) ran a consultation on a proposal that adverts "must not include gender stereotypes that are likely to cause harm, or serious or widespread offence".
An ASA spokeswoman said: "We've published evidence that shows gender stereotypes have the potential to cause harm because they limit how people's potential is considered by themselves and others - with costs to the individual, economy and society.
"We've already been taking action to ban ads which reinforce harmful stereotypes and we'll publish the results of our consultation around new rules for advertisers later this year."
Article here www.bbc.co.uk/news/uk-45254129
On a quick look so far the ASA research seems quite interesting (although some uses of term gender, sex may be what they actually mean...)
www.asa.org.uk/genderresearch.html