Hi GeorgeWe discussed this briefly at Parc Slip recently. I checked my records and I recorded Small Seraphim in the garden trap in July 2013, June & July in 2014 and at least one for every trapping night in June this year - so they are certainly regular visitors to Creigiau.
So we did, sorry I'd forgotten that. It does seem that they are genuinely increasing in the east of the county. I've had then twice at Lanlay Meadows too.