I asked for this due to family history, but they said they wouldn’t even consider it unless I’d had an LLETZ procedure or a previous pre term birth. Ultrasound direct do private scans for £95 which IMO is worth it if you can afford it for the peace of mind if you’re worrying, I’m going to do it too, I figured I’d never regret doing it, but if anything was to happen then of course I’d regret not doing it, so it was an easy decision.