Despite all this, they come across in this series as an exceptionally goodhumoured bunch who struggle to do a difficult job under impossible circumstances.

It just goes to show what can be achieved in seemingly impossible circumstances.

Members used to be asked their opinions by visiting inspectors of constabulary, regaining lost community confidence, often in impossible circumstances.

It was impressed upon us trainees that what might seem odd, unusual or even downright impossible circumstances set out by applicants were almost always real to them.

The commander had to land the aircraft in impossible circumstances, with no second chances.