Thanks for the quick reply Andrew - Here is a screenshot of the settings on both UE4 4.8 and 4.7.
Nothing is different but the results are drastically different - I should also note that no matter how much I edit and tone the AO down in 4.8, I still get the jittering and artefacts :(. One thing I do notice however is the lack of an “Occlusion Distance” option in 4.8. I don’t use it in my 4.7 scene anyway, but thought I’d mention it :).
Cheers,