That is the typical -NAO dipole look. When there are anomalous +heights over the NA, the heights adjacent to it are anomalously low. The oddity is the ridging that has been occurring underneath lately despite that. It is what you would generally expect if the NAO were significantly positive(lower h5 heights over GL).
eta: a super -PNA can certainly overwhelm a weaker/east based -NAO, but typically if the NAO is legit negative, SE ridge is suppressed.