Omega theme sidebar padding
I have fixed this now by adding:-


.region-sidebar-second .block-inner {
  background-color: white;
  border: 1px solid #CCCCCC;
  border-radius: 10px 10px 10px 10px;
  padding: 10px 20px 20px;
  position: relative;
  margin-bottom: 20px;
}


Sorry, it was a lack of knowledge of css causing the problem.