Thank you very much for the quick reply Tom.
Yes that worked, but I see what you mean:
By keeping separate containers and applying the css change I can see the site now sits on the pale green background but, as the BB elements don’t go full width it means seeing a container within a container so its prpobably better aestethically to set the site as “one container”. http://e-ha.co.uk/spc/
Shame because on pages with sidebars, like the blog pages, the separate white containers look nice and clear on the pale green background. http://e-ha.co.uk/spc/april-2016-parish-council-meeting-minutes/