Q:

Appendix page and thispagestyle{empty}

I have the following document:
\documentclass[twoside, a4paper, 12pt, notitlepage]{report}
\usepackage[english]{babel}
\usepackage[toc,page]{appendix}

\usepackage{fancyhdr,graphicx,lastpage}% 
\fancypagestyle{plain}{
    \fancyhf{}% Clear header/footer
    \fancyhead[L]{\textit{\leftmark}}
    \fancyhead[R]{\thepage\  / \pageref{LastPage}}
}
\pagestyle{plain}

\begin{document}
\chapter{example}
%\thispagestyle{empty}
\begin{appendices}
    %\thispagestyle{empty}
    example
\end{appendices}

\end{document}

Is there a way to remove the header from the title page of the appendices? 
\thispagestyle{empty}

removes the header only from the page before or after the title page. 
Thank you in advance. 

A:

The plain page style is used in appendices still, but it still has of course the heading settings. 
One way is to redefine in the plain pagestyle again in the appendices environment, with, say \AtBeginEnvironment. 
fancyhdr complains about headheight being too small, that's why I adjusted it.  
\documentclass[twoside, a4paper, 12pt, notitlepage]{report}
\usepackage[english]{babel}
\usepackage[toc,page]{appendix}

\usepackage{blindtext}
\usepackage{etoolbox}

\makeatletter
\AtBeginEnvironment{appendices}{%
  \clearpage%
  \fancypagestyle{plain}{%
    \fancyhf{}%
    \renewcommand{\headrulewidth}{0pt}
  }
  \thispagestyle{plain}
}

\usepackage[headheight=20pt]{geometry}

\usepackage{fancyhdr,graphicx,lastpage}% 
\fancypagestyle{plain}{
  \fancyhf{}% Clear header/footer
  \fancyhead[L]{\textit{\leftmark}}
  \fancyhead[R]{\thepage\  / \pageref{LastPage}}
}
\pagestyle{plain}

\begin{document}
\chapter{example}
\blindtext[10]
\begin{appendices}
  \chapter{foo}
\blindtext[10]
\end{appendices}

\end{document}

