Following the storms in mid August the footbridge over the Luibeg Burn near Derry Lodge (NO040934) was washed away. This leaves access to the Lairig Ghru via this route difficult.
There is a rather precarious tree some way upstream or another bridge a couple of Km upstream or the option of wading the Burn if it is safe - it is not, at least not yesterday.
The optional route to the southern end of the Lairig Ghru is to go from Linn of Dee via the White Bridge and Chest of Dee, quite a long detour and leaves access to some of the SOTA summits (ES-013 and ES-011 principally) near to Derry Lodge accessible only by circuitous routes.
Barry GM4TOE