From the Chiltern Website: -
Oh well, guess the people of Aylesbury have to put up with a shoddy service again.Were delighted to inform you that it has now been declared safe to run trains through the tunnel at Gerrards Cross.
Network Rail are currently replacing the track and signalling that was damaged when the tunnel collapsed.
Once this work has been completed and all equipment has been tested, well be able to operate our normal timetabled service again.
Were hoping that the first trains will run through Gerrards Cross on Saturday 20 August.
Please keep a lookout for further updates later this week to find out how work is progressing. We'll be producing separate information about exactly what caused the tunnel to collapse, what has been done to make it safe again, and what is planned for the future.