Hiya
I don't know what they are, but here's a link...
http://maps.google.co.uk/?ie=UTF8&ll=51.410771,-1.839502&spn=0.002352,0.004807&t=h&z=18
:)
G x
Goff - that's not a slow exposure shot of you or me moving across the field, is it?
Looks from the shadows that they are power/telephone lines. Maybe there's 'The Modern Utilities Enthusiast' that we can post this on?