For the duration of the High Street closure, the 12 will divert as follows.
All buses will depart from the stop outside The Swan pub (not opposite as they usually do).
They will then turn right at the roundabout at the end of the High Street onto A132, Golden Jubilee Way, right again at the next roundabout onto the A129, then serve Halls Corner as usual.
Coming into Wickford, the buses will use their normal line of route.
As soon as the roadworks are finished, the buses will return to normal.