Cyclist performing stunt on bollards on the street. He is wearing safety helmet and bounces on the bollards on his bike.

Air-Sea rescue Sea King helicopter hovering over turbulent sea as it hoists person dangling on rope up to safety, some choppy water hits camera lens

London, England: Building as Fresnel lens dropped down revealing bikes on railings in lorry drivers 'blind spot'

Close shot of blue and white cordon tape with the words 'Police' on it, fluttering in wind against blurred background

England: General views at reception area of hospital ward, young male doctor putting on disposable plastic apron

Street cleaner sweeping an empty street in Paris. He is wearing overalls and a fluorescent yellow, high visibility jacket. He picks up litter and outs it into his cart and wheels it away.

Monkeys climbing on telephone wires.

London, England: Metronet engineers (wearing orange work overalls) gathered on station platform at end of shift, signing time sheets

Sea-level view of Air-Sea rescue Sea King helicopter hovering over turbulent sea, two people are hoisted down from helicopter into rescue dinghy boat as choppy waves lash against camera lens

London, England: Worker putting up a poster on the opposite side of the track next to the underground station platform

Underwater shot of many small and colourful fish swimming around a dark, spindly coral. The fish swim to take cover in the coral and return to swim playfully around it.

Underwater shot of many small, colourful fish swimming over a pale coloured coral reef. The fish contrast against the vivid blue sea water.

London, England. Low angle view of a rotating sign reading 'New Scotland Yard' and 'Working for a Safer London'. The Metropolitan Police headquarters; New Scotland Yard building in the background.

London, England: London Underground workers fitting new piece of rail track, welding track

London: Mid shot of a hospital laboratory technician transferring a sample of blood to a test tube using a pipette.

Various shots of Close Circuit Television (CCTV) cameras mounted on buildings.

Two unidentifiable lifeguards looking through binoculars from a lifeguard tower on Venice Beach, Los Angeles, California, USA.

London, England. Close up view of rotating sign reading 'New Scotland Yard' and 'Working for a Safer London'. Metropolitan The Police headquarters; New Scotland Yard building in the background.

London, England: London Underground workers gathered on station platform being briefed by chief

London, England: Lorries arriving at London 2012 Olympics construction site and driver fitting Fresnel lenses to door windows to prevent blind spot.

London, England: Young male doctor cleaning hands in wash basin, close up of hand washing

Monkeys climbing down a telephone pole.

London, England. Low angle view of rotating sign reading 'New Scotland Yard' and 'Working for a Safer London'. The Metropolitan Police headquarters; New Scotland Yard building in the background.

A Queen's Guard dressed in a grey overcoat and bearskin hat carrying a rifle fixed with a bayonet exits a sentry box outside Buckingham Palace in London, England. The guard swaps the rifle over from his right shoulder to his left, turns, and marches across to the left. Heavy snow blows across the scene.

London, England: Workers repairing rail track inside tunnel

1970s London, England. Zoom in to close up from a wide shot of a Royal Guard of the Household Cavalry in red tunic and helmet with a white plume on horseback. Zoom in to a close up from a wide shot of a Royal Guard standing on sentry duty also wearing a red tunic and helmet with a white plume.

London, UK: Speeded up time-lapse shot of construction workers on a building site.

London, England: Workers laying concrete round bolted section of rail track

Medium view of a Queen's Guard dressed in a grey overcoat and bearskin hat standing on sentry duty outside Buckingham Palace in London, England. The guard carries a rifle fixed with a bayonet. Heavy snow blows across the scene.

Underwater shot of lots of small, colourful fish teeming over a coral. A dome-shaped pink coral is at the centre of the reef.

Kandahar, Afghanistan: Remote control robot camera on caterpillar tracks patrolling an area containing incendiary devices.

London, England: Hospital cleaner sweeping floor of corridor. Close up of mop cleaning hospital floor

London, England: Underground rail engineers at work in tunnel (wearing high-vis jackets and hardhats), pushing equipment along tracks

Metropolitan Police Headquarters; New Scotland Yard building London, England.