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| CONTENTS


Mechanised 10


TBM breakthrough at Kidbrooke shaft on London Power Tunnel 2 Image credit: Hochtief-Murphy JV


10 18


Comment 3 REGULARS 6 News 42 Events


22 25 30


18 30


25 37


37


Tunnelling TBM transition through Kidbrooke shaft Sid Kaul, Hochtief-Murphy JV


The winning paper in this year’s BTS Harding Prize Competition looked at the technical and teamwork challenges, and valuable lessons gained on London Power Tunnels Phase 2, at Kidbrooke shaft.


Boring Practice Keren Fallwell, T&TI


The latest small diameter TBM technology developments that were employed to race in tunnel construction as part of the Boring Company’s latest annual competition.


Fire Safety Safety Spotlights A review of some highlights among the recent presentations and papers on Fire Safety at WTC.


Insight: H&S


HPCA in tunnelling Dr Donald Lamont An introduction to ITA/BTS CAWG’s Report 10 covering the latest guidance on high pressure compressed air (HPCA) work in tunnelling.


Under Pressure Dr John Colvin


Research supported by BTS CAWG looks at the contribution of MRI in health screening for dysbaric osteonecrosis in compressed air workers.


BTS/BTSYM


Chairs’ Corner John Corcoran; Arabel Vilas Serín Summaries of the latest activities and outreach by the BTS and BTSYM.


July 2025 | 5


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