Source ILTJ134255.151+541432.752, which was initially selected as an LBCS calibrator but is actually ~ 20 arcsec in extent. The hotspots are clearly visible, and the core of this galaxy is tentatively detected with 5σ. The bright compact source in the northern lobe may be an interloping galaxy, as the northern hotspot is visible at the tip of the emission plume. Left panel: LOFAR-VLBI image, with a noise level of 99.33 μJy bm⁻¹ and a beam size of 0.29′′ × 0.21′′. The contours start at 5σ and increase in steps of for a maximum of 5 levels. The colourscale is a log stretch from − 5σ to the maximum contour level. Right panel: 6′′ LoTSS image, with white contours defined in the same way relative to the noise in the 6′′ image. The black contours from the high-resolution image are overlaid.