If you have ever written your name in the air with a sparkler on bonfire night then you have experimented with light painting.
Baffled by the “lines of light floating in mid-air”, Scottish photographer David Gilliver knew he had to try capturing them with his camera.
"I thought it was like sorcery, it's like magic,” he says.
For 15 years, Mr Gilliver has been a pioneer in the technique of light painting.
Now, one of his pictures - which he has called Where Rainbows Sleep - has been shortlisted for this year’s British Photography Awards in its newest category - best low light photograph.