I worked on the national teen pregnancy and sexual health strategy for the department of health back in 2008-2010
At that time the focus was entirely on condom usage, and chlamydia testing, as this was the most rampant STI, and high St chemist 'pee in a pot' testing had been introduced (ie you don't have to have a swab up your vag or cock to get tested)
That strategy was a bit too successful as testing shot up, and the perception that a course of ABs would sort it, so condoms as STI prevention became less strong a message (and at this time the MAP was also now widely available)
So at this point the focus shifted beyond condoms to LARCs - as pill taking was notoriously unreliable, whereas a depo shot or Mirena was much more effective as perfect use rates were higher
When the Tories came in they slashed budgets and I moved jobs, but it was genuinely one of the most rewarding projects I've ever worked on
My proudest career moment was writing a ministerial submission to report the results of a pilot study where we'd actually significantly managed to move the needle on usage rates for condoms
The focus groups with teens talking about attitudes to sex and contraception were absolutely fascinating