Thanks everyone.
The technique is simple really, all you need is a sturdy tripod, a DSLR camera
and a remote so that you can keep the shutter open while you run around with a flash. The colours are created by placing a gel (coloured filter) in front of the flash. Its that simple. Heres some technical data:
Camera: Nikon D300
Exposure: 129 sec (129)
Aperture: f/5
Focal Length: 10 mm
ISO Speed: 100
Exposure Bias: 0/6 EV
I got an email from the solway museum, and Ill be travelling there in the next day or 2 as theyve kindly given me permission, yay!
Watch this space..