I'll try to join you, dependent when you do it. If you set up a meet-up, you can invite us all. I did this last night - means, for example, you can set the meet-up for 7 o'clock but go on to Zwift at 6-30 for a warmup. Then as normal it will transfer you to the start of the meetup. I often use this method as it allows me to warm up properly before the ride, but not have to quit Zwift and rejoin just to start the route.
I watched the time last night from spawn point to banner, and this was bang on 4 mins for me. My target time was between 37 and 38 mins, so on the road I needed to cross the finish between 41 and 42 mins. Where I did cock up though, is lack of knowledge about the course; for some reason I was expecting to climb Box Hill not go over the rolling hills of Richmond Park. I was also expecting the finish to be by the Tower/Upper Thames Street and not back on the Mall.
Not sure any of this made any real difference to my time, but at least next time I'll be mentally better prepared