These high-flying workers employed by National Grid Transco give a new meaning to the phrase 'having a head for heights'.

Powerful stuff

They were photographed carrying out maintenance work on power lines near Sandford-on-Thames.

Carried in metal cradles suspended beneath the conductor cables, they slowly made their way between massive pylons.

A spokesman for Transco said that although live line working was sometimes carried out, the power had been switched off before the men started their repair and inspection tasks.