As church attendances continue to fall, a commenter at Thinking Anglicans has the answer :
I know that there are many factors governing the decline of church attendance. But how can it help to to continue to alienate those who are gay or lesbian? If we take the conservative estimate of 5% of the population as being gay, we, in the UK, are speaking millions of people who are denigrated and vilified by the church, and feel there is no place for them within its doors.
It's a pity I'm banned from the comments at their site (after all, diversity and inclusion is so important, isn't it ?) - otherwise I'd be replying to the effect that :
How can it help to continue to insist upon the Ten Commandments, thus alienating those people who are adulterers, murderers etc ? If we take the figure of 30% of the UK male population as having a criminal record, there will be millions of ordinary thieves and idolaters who feel that there is no place for them ...
Perhaps the 5% are converting to Islam.