In this Part "high risk construction work" means construction work—
(a) where there is a risk of a person falling more than 2 metres;
(b) on telecommunications towers;
(c) involving demolition;
(d) involving the removal or likely disturbance of asbestos;
(e) involving structural alterations that require temporary support to prevent collapse;
(f) involving a confined space;
(g) involving a trench or shaft if the excavated depth is more than 1·5 metres;
(h) involving a tunnel;
(i) involving the use of explosives;
(j) on or near pressurised gas distribution mains or piping;
(k) on or near chemical, fuel or refrigerant lines;
(l) on or near energised electrical installations or services;
(m) in an area that may have a contaminated or flammable atmosphere;
(n) involving tilt-up or precast concrete;
(o) on or adjacent to roadways or railways used by road or rail traffic;
(p) at workplaces where there is any movement of powered mobile plant;
(q) in an area where there are artificial extremes of temperature;
(r) in, over or adjacent to water or other liquids where there is a risk of drowning;
(s) involving diving.