\usepackage[hyphens]{url}
\usepackage[pdflang={en-GB},breaklinks,plainpages=false]{hyperref} % hyperlinks
\usepackage{xr} % hyperlinks
-%\renewcommand*{\backref}[1]{}
-%\renewcommand*{\backrefalt}[4]{[{%
-% \ifcase #1 not cited.\or p.~#2.\else pp. #2.\fi%chktex 1
-%}]}
\hypersetup{%
pdftitle={\mytitle},
pdfauthor={\myauthor},