Medical and Doc reveiw - How it went:
Medical - took a couple hours, I am a family of 6 (wife and 4 kids), so assume this to be worse case (unless you have more kids than me.. lol). It was straight forward, chest x ray, nurse reviews vaccinations and a discussion with the doctor regarding medical history.
Embassy document review - we left 11:50am and drove to embassy which took 30 mins (traffic). Parked up at Waitrose car park and a 5 min walk to embassy, so got there around 12:30ish.
Once we made our way to the embassy we were given a number, an announcement for our number was called out and the booth we need to go to.
They just review the passport, picture, police certificate, marriage certificate, birth certificate etc and then gave it back to me which I need to bring on the interview day (May 7th). Me and my wife's biometric was taken , fingerprints. They didn't ask any questions relating to my application, It was very straightforward, probably took around 45 mins (end to end) , we are a family of 6 bear in mind.
I would say you should have enough time to get to embassy, this was my worry. I saw people from the medical getting there as I was leaving... so I would not worry too much. I was also given the same feedback by another person on this forum who has done the new process.