Thanks @Moin - I updated to 3.5.0.beta8-dev (1c7dae8f42) and have navigated to the single item review page (and can see the new UI) by clicking the date i.e
at /review?additional_filters=%7B%7D&sort_order=score&status=ignored
I was unaware that the individual review item page existed as had never clicked on the dates before. Do you know if there are plans to signpost the individual review item pages more clearly from the review queue page in some way? Adding something along the lines of a ‘View review’ link perhaps?