National Highways have clarified the closure this weekend.
It's the Southbound side of the roundabout that is closed. So there is no access to the A1 or Birtley from the direction of Low Fell.
In which case the 21 will serve its evening diversion, the X21 could follow the same diversion and go through Birtley from Lamesley and the 28 will likely go down Easedale and Lamesley as well
GNE have updated the site but no reference to the 28
RE: Disruptions and driver shortages