Full article in the Times, if you have access https://www.thetimes.co.uk/article/how-briton-at-the-sharp-end-saved-egypt-s-oldest-pyramid-q7l69flcx
Otherwise, the Daily Mail has some very good photographs of the now-restored interior and a brief description of some of the innovative techniques used, copied below.
https://www.dailymail.co.uk/sciencetech/article-8079495/Egypt-reopens-ancient-step-pyramid-renovations.html
"Cintec won a lucrative contract to help save the oldest pyramid in Egypt in 2011 following damage caused by an earthquake in 1992.
The firm was recommended for the job in 1992 when it was working on shoring up Windsor Castle after the fire that same year.
The firm was also called upon by the Indian government to strengthen a major Delhi bridge ahead of last year's Commonwealth Games.
Mr James developed innovative methods based on his previous experience to strengthen the ancient structure.
One such method includes boring holes into the walls, which are littered with voids, surrounded in a fabric sock.
This rod can be several yards long and passes through cracks in the walls of the pyramid's interior.
Mortar is then poured between the fabric and the metal rod and, as it hardens, expands and fills the voids, adding a significant amount of structural integrity.
The main risk to the engineers toiling away within was triggering the collapse of the pyramid.
An innovative airbag-like system was used to support the walls as steel anchors were inserted.
Due to the instability of the ceiling, deep lime mortar pointing was carried out to ensure it was structurally sound.
Engineers were then able to carefully use diamond drills and bore holes for the stainless steel anchors.
Mr James said at the time: 'We recognise the importance of both historical and religious structures to their cultures and hope to continue to develop advanced reinforcement systems that will preserve archaeological structures for future generations.
Mr James has gone on to become a global authority on the restoration of ancient buildings and has penned a book specifically about his work in Egypt, called 'Saving Pyramids'. "
Something is not right. This message is just to keep things from messing up down the road