Please note that the B488 (the road that runs from Ivinghoe into Leighton Buzzard) is closed at Grove (almost where it joins the A4146) for emergency road works. There is no access to the A4146, or past Rowden Farm Lane.
The signposted diversion will take you across the Beacon and up the A4146 past Edlesborough.
The roadworks are anticipated to continue until 3 December 2013.
Further information can be found on the Transport for Bucks website.