What is the earliest the hospital will induce with gestational diabetes (UK hospitals)?

I'm 34 weeks along on monday and hospital said they will induce early (at the very least by a week) as the placenta stops working as well as it should. They haven't told me when though, Baby was measuring 35 weeks at 32 weeks and 5lbs 3oz (above 99th centile) and I have increased amniotic fluid too. They said they'll be looking for baby's lungs to develop before they do induce me... It's driving me mad not knowing lol.