Hi everyone,
Again, long time lurker. We applied from London on 9 July 2018 pretty much front loaded apart from police checks submitted in August.
We had a RFI on 22 November; they wanted my (the sponsor's) evidence of Irish citizenship (apparently a passport wasn't good enough) and a reissued UK police certificate for the applicant (middle name was omitted on one section). We submitted the required evidence, together with updated travel information, on 4 December.
Good luck everyone!