Twenty Eleven

body {
padding: 0;
}
#page {
margin: 0;
max-width: 100%;
}

You should also set the background so it wont load since it wont be seen.

body.custom-background{
background-image: url('');
}

Thanks for the quick reply

That worked great except on pages where there is not much content, I have a grey space at the bottom of the screen

example https://mchpictures.co.uk/contact/