The most significant British film ever made about homosexuality (other than 'Victim' in 1961) appeared in 1978.
The Sexual Offences Act was passed in 1967 in the UK, allowing consensual homosexual acts in private between two men over the age of 21.
Eleven years on, when this film was made, it's clear from the following clip that not very much had changed in perceptions of gays in general society.
The film still resonates almost forty years on. I don't believe much has changed in the perception of British school children about homosexuality. There is still ignorance, there is still ridicule, there is still bullying.