I'm not sure what I have done here - the line is thinner under the menu items and thicker where there are none.
I can change the thickness of the line (it's bar 1) in the header section but I can't work out how to make it show across the whole width of the page.
Any pointers would be fab, I'm going round in circles!
www.whataworld.co.uk

try adding this to the css inserts
div#menu1 ul.rMenu li {
border-bottom: 1px solid #49B5A8;
}

perfect, thank you so much!