The lanes are a great improvement. The main issues I have are
cars and delivery vans parking in them whilst at the shops or “dropping” off.
there should be a protected entry onto the road at the Foxhall roundabout which you have to rejoin (at moment you have drivers trying to stop you ).
With a bit of work mostly road markings, cycling could be improved from the hospital to Harwell village. This stretch can be very busy and the usual driver hassles are common.