Hi Matt, thanks for getting back to me. The site is electroustic.co.uk and the problem seems to be affecting most of their products pages. For example:
http://electroustic.co.uk/connectivity-products/industrial-ethernet/accessories
http://electroustic.co.uk/connectivity-products/industrial-ethernet/wlan-industrial-wireless-lan
http://electroustic.co.uk/connectivity-products/automation-technology/o-modules