a mysterious light has appeared on the dash of my peugeot 106 it is a orange light shaped like a engine

Engine management light. Engine needs attention. Tke it in for a service.

its your engine management light, a sensor is probably broken and needs replacing, take it to a garage to be plugged in.

has nothing what so ever to do with a service that is the spanner light

it means your engine has moved back home to france.
Nah as said above its an engine warning light, Check your coolants oils and fluids is basically all l could tell you.
Cheers
hope it helps lighten your situation