5 GHz EVN+e-MERLIN image of RS Oph on 2021 Sept. 11, 34.3 days from t_ini. Left: full scale image. The beam size is shown by the ellipse in the bottom left corner (9.4 mas × 12.1 mas in p.a. −8.5°). The white cross represents the position and uncertainty (magnified by a factor of 50 for visibility) of RS Oph in Gaia DR3, moved to day +0 by application of proper motions. CC refers to the compact component close to the Gaia position, WL to the western round lobe, and EA is the arc structure to the east. The colour scale and contours represent total intensity emission of the cleaned image, starting at ±5σ (±0.25 mJy beam⁻¹) and increasing by steps of . Right: zoom onto the WL component, with the best-fit ring and centre from 2021 data overlaid as a cyan dashed line, and the best-fit ring and centre for 2006 from Rupen et al. (2008) shown with the yellow dotted line, ported to the same 2021 epoch by application of Gaia DR3 proper motions. The black cross marks the delta component accounting for most of the emission from CC. The colour scale is the same as in the left panel, and contours start at 8σ for the sake of clarity.