This directory contains the latest release of IGTF version 1.42. The latest release is also available in latest (with the version in http://cert.ca.ngs.ac.uk/latest/version.txt )
certificates.tar.gz - contains all certificates in a certificates folder, so to unpack manually, cd to /etc/grid-security/ and untar.
ngs-igtf-vdt - VDT data file.
NGS-IGTF-+-1.42-1.noarch.rpm - RPM (signed with https://ca.grid-support.ac.uk/pub/key.gpg)
The URL (baseurl) for YUM is http://cert.ca.ngs.ac.uk/1.42-1/yum/