poster.tex

\documentclass[final]{beamer}

% Search for theme in a subfolder
\makeatletter
  \def\beamer@calltheme#1#2#3{%
    \def\beamer@themelist{#2}
    \@for\beamer@themename:=\beamer@themelist\do
    {\usepackage[{#1}]{\beamer@themelocation/#3\beamer@themename}}}

  \def\usefolder#1{
    \def\beamer@themelocation{#1}
  }
  \def\beamer@themelocation{}

\usefolder{UoB}
\usetheme{UoBposter}
\usepackage[orientation=portrait,size=custom,width=91.44,height=106.68,scale=1.5,debug]{beamerposter}  % e.g. custom size poster

\usepackage{lipsum}
\usepackage[english]{babel}

\title{Title of the poster}
\author{Authors Of, The Poster}
\institute[University of Bristol]{Department of Computer Science, University of Bristol}
\webpage{http://bristol.ac.uk}
\email{<First.Last>@bristol.ac.uk}
\date{\today}

\begin{document}
  \begin{frame}{}
    \vfill
    \begin{columns}[t]

      \begin{column}{0.25\linewidth}
        \begin{block}{1. First}
          \scriptsize{\lipsum[1]}
        \end{block}
      \end{column}

      \begin{column}{0.25\linewidth}
        \begin{block}{3. Third}
          \scriptsize{\lipsum[2]}
        \end{block}
      \end{column}

      \begin{column}{0.4\linewidth}
        \begin{block}{5. Fifth}
          \scriptsize{\lipsum[3]}
        \end{block}
      \end{column}

    \end{columns}
    \vfill
    \begin{columns}[t]

      \begin{column}{0.25\linewidth}
        \begin{block}{2. Second}
          \scriptsize{\lipsum[4]}
        \end{block}
      \end{column}

      \begin{column}{0.3\linewidth}
        \begin{block}{4. Fourth}
          \scriptsize{\lipsum[5]}
        \end{block}
      \end{column}

      \begin{column}{0.35\linewidth}
        \begin{block}{6. Sixth}
          \scriptsize{\lipsum[6]}
        \end{block}
      \end{column}

    \end{columns}
  \end{frame}
\end{document}