Instead of stainless steel we heard about Cured-in-Place Pipe lining (CIPP) and other trenchless technologies for the rehabilitation of pipeline systems and instead of Craig Bennett, Michiel (Amie) Colyn was our informant. CIPP – a polyester or glass fibre non-woven fabric (Kevlar: only Germany) with a resin impregnation, with structural strength (up to 100MPa!) – can be used in water supply, but only with epoxy resin. In sewers, curing can be ambient (only with chemical curing), hot water, steam or UV light (a train of lights moves down the tunnel), the latter having the advantage of the process being able to be stopped if there is a hitch, re-starting after the problem has been overcome. However, where deformation exceeds 10% pipe cracking or other methods must be used.