Helical tieback anchors are presented as tension-only elements installed beyond the active wedge to support vertical or near-vertical walls, typically using grouted or screw-in steel shafts with load-tested working capacities and corrosion protection. Helical soil nails are shown as shorter, more closely spaced inclusions installed within the failure mass to create a reinforced soil block, often suited to cut slopes or temporary shoring where access limits anchor length. Selection hinges on geometry, required wall deflection, available bond length, construction access for installation rigs, and tolerance for ground movement.

Repairing the Llangollen Canal breach near New Mills Lift Bridge, Whitchurch, is expected by the Canal & River Trust to cost several million pounds and occupy most of 2026, severely disrupting navigation on this key feeder from the River Dee. Engineers will need to dewater and stabilise the affected pound, reconstruct the failed canal bank and towpath, and reinstate clay lining and embankment drainage to prevent further leakage. The scale and duration signal significant geotechnical investigation and temporary works to manage soft ground and maintain adjacent infrastructure.

Ground preparation is under way to tackle sub‑optimal geology ahead of Lower Thames Crossing tunnelling, with drives under the river not due to start until late 2028. Tunnels director Alastair Lewis is sequencing works to deal with weak alluvium and variable chalk, aiming to stabilise the alignment before launching large‑diameter TBMs for the twin road tunnels. Early treatment of poor ground conditions is intended to reduce settlement risk for the approaches and portals and to de‑risk TBM performance beneath the Thames.