Found the Psyllid Trioza centranthi in Holme-next-the-Sea today. Most information on the line suggests this is quite rare, but increasing in recent years (Naturespot). I first saw it a couple of weeks ago in Dorset, and being apparently found in southern counties I wasn't expecting to find it back here in Norfolk. However in the space of a few days have found it here and Sheringham, and in both intances on the first red valerian I searched! Clearly not that scarce at the moment, just under-recorded!
Get out and search red valerian and don't forget to i-record your record so the spread can be documented.