Route check completed yesterday in somewhat blustery conditions. The all new track is available to download
here and route sheet / notes
here. They'll also be on the event entry page in due course, but the links here should allow you to re-format / edit them if required. Note that the only changes to the route are after Stanford in the Vale from around 278km.
Ran into the Severn Bridge northerly cycle path closure as noted elsewhere, but it's a relatively easy diversion via the southerly alternative and expecting it will be open in two weeks time.
Also note that the recommended route brings you in through the centre of Oxford to appreciate all its late night charm, but if you are returning direct to Peartree it's possible to shortcut the route a bit from Eynsham, picking up the cycle path adjoining the A40.