Hi Nick,
thanks for the quick reply, yes i did, i have tried several times on lower splits, the last one i tried i put back to 400mb so thats why that shows in that log. I belive the total site files are around 1.3GB, could this be causing issues?
Update: Our web-hosting provider has moved our website to a different server, and this now seems to have ‘cured’ the problem. However, they did note “the plugin is requiring more than our shared hosting limits of 60 secs execution time”, so we can only assume the Wordfence plugin does have some limitations when used on certain server configurations.