I was looking at the SKS Chromoplastic guards, do they have the mudflap things at the bottom? I couldn’t make it out, some of them seem to, some don’t.
Should have said, tyre doesn’t need to necessarily be 28mm, just wider than the 23mm ones I have been using (a bit more confidence on the wet roads this time of year). I have used Vittoria Open Pave’s last year, excellent tyre, certainly feels wider than the 24mm they are, and very grippy. Unfortunately they wear quickly, cut quite easily and are very expensive. Very grippy though.