\documentclass{article}
\usepackage[paperheight=300mm,paperwidth=200mm,margin=0mm]{geometry}

\usepackage{graphicx}
\usepackage{parskip}

\newcommand{\ParkrunBarcodeOne}[1]{
  {
    \setlength{\fboxsep}{5pt}%
    \setlength{\fboxrule}{1pt}%
    \fbox{
      \includegraphics[
	  clip, 
	  % trim=left bottom right top
	  % Original
	  % trim=1.22cm 22.13cm 11.49cm 2.71cm,
	  % Smaller version
	  trim=2.50cm 22.13cm 12.8cm 4.20cm,
	  keepaspectratio
	]{#1}
      }
  }
}
\newcommand{\ParkrunBarcode}[1]{
  \ParkrunBarcodeOne{#1}\ParkrunBarcodeOne{#1}\ParkrunBarcodeOne{#1}\\
}

\begin{document}

\ParkrunBarcode{Beth}
\ParkrunBarcode{Caolan}
\ParkrunBarcode{Charlotte}
\ParkrunBarcode{Henryk}
\ParkrunBarcode{Nancy}
\ParkrunBarcode{Tommy}
\ParkrunBarcode{Fufu}

\end{document}