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Hi I put it on the back burner for a while. This morning i had another go and I think it was caused by shortcodes for accordion style links put in a long time ago by someone else. I've taken the shortcode out and will see if things have improved on the next report.

Hi Niamh, Thanks for writing in and the update. I'm really glad you were able to figure this out Let us know if there's anything else and have a great day! Best, Sam Moz Helpster

Thank you Robert for your advice. Much appreciated. Niamh

Thank you Philipp. Your answer is a great help.