On 31st July I had a look for leaf mines on oak at Hailey Park Meadow in Llandaff North. I was pretty disappointed at the time to only find one mine, but thought I'd bring it home anyway to try and rear the adult. This emerged today and proved to be another Phyllonorycter muelleriella.
The location (ST1479) fits well with the other recent records from Coryton roundabout and Radyr Golf Course (see map below). The tree from which the mine was collected was young, and the habitat certainly couldn't be described as ancient woodland (the stated habitat for this species in the literature). There are, however, some large oaks not too far away.