\usetheme{default}
\setbeamertemplate{background canvas}{\includegraphics
	[width=\paperwidth]{uclheader.pdf}}
	
\definecolor{bluecolour}{rgb}{0.4,0.5,1}
\useinnertheme[shadow=true]{rounded}
\setbeamertemplate{items}[circle]
\setbeamercolor{title}{bg=bluecolour, fg=black}
\setbeamercolor{structure}{fg=bluecolour}
\usepackage{helvet}