The latest stage in extensive recovery and reinstatement works has begun following the Stonehaven derailment on August 12.

Driver Brett McCullough, 45, conductor Donald Dinnie, 58, and passenger Christopher Stuchbury, 62, died when the 6.38am Aberdeen to Glasgow Queen Street train crashed into a landslide across the tracks near Stonehaven, Aberdeenshire, following heavy rain.

Engineers from Network Rail are now relaying over 500 metres of track following the recent completion of work to repair the bridge and embankment damaged in the accident.

Work is due to continue into November as teams remove and replace the damaged track and relay 400 metres of telecoms cables.

Over the past few weeks, repairs to 70 metres of bridge parapets have been completed and the crane pad built over the Carron Water for the recovery of the carriages in September has been removed.

READ MORE: Stonehaven crash: Task forces launched to assess impact of heavy rainfall on railway

A considerable amount of engineering work is also being carried out to repair and extend drainage systems on the railway track and lineside embankments at the site in a bid to avoid similar tragedies in the future.

Alex Hynes, managing director of Scotland’s Railway, said: “This is a very complex and challenging recovery and repair operation and it will take time for our engineers to fully restore the track and other infrastructure.

“While we will reopen the line for customers as soon as possible, our focus throughout the recovery process has been on making sure we do all we can to learn from this terrible accident and try to prevent similar incidents happening in the future.”

Meanwhile, ScotRail is operating a shuttle service between Aberdeen and Stonehaven and between Dundee and Montrose to keep customers in the north east moving.

A replacement bus service also remains in place between Dundee and Stonehaven, and between Dundee and Aberdeen.

Cross-border operators are also running replacement buses between Aberdeen and Edinburgh.

After the incident on August 12, Network Rail introduced a range of additional safety measures.

HeraldScotland:

READ MORE: Stonehaven crash: report finds almost 600 sites 'similar' to tragedy location

As an immediate precaution, hundreds of sites nationwide with higher-risk trackside slopes, similar to Stonehaven, were inspected.

These inspections were carried out by both in-house engineers and specialist contractors, supplemented by helicopter surveys.

Network Rail has also launched two taskforces, led by independent experts, as part of its long-term response to climate change and the challenge of maintaining its massive portfolio of earthworks (embankments and cuttings), many of which date from the Victorian era.

Dame Julia Slingo FRS, former chief scientist at the Met Office and a world-renowned expert in climatology, is leading a weather action taskforce with the objective of better equipping Network Rail to understand the risk of rainfall to its infrastructure, drawing on the latest scientific developments in monitoring, real-time observations and weather forecasting.

Lord Robert Mair CBE FREng FRS is spearheading an earthworks management taskforce to see how Network Rail can improve the management of its earthworks portfolio, looking at past incidents, latest technologies and innovations and best practice from across the globe.