Spatial trends along the Original TRG and its filaments from regions highlighted in Fig. 7. Top: Flux density along the main features of the Original TRG, highlighted in different colors. Error bars refer to the errors on flux densities, calculated assuming a 10% flux uncertainty (as for the LoTSS, Shimwell et al. 2022). Colored arrows indicate the direction followed by the spatial trends. Bottom: Profile across the Original TRG following the cut depicted in Fig. 7. The noise-subtracted data are shown as open circles. The black solid line shows the total fit using three-Gaussian fit. The three Gaussians (individually shown with red dashed lines) correspond (from left to right) to F1, the main tail, and F2, respectively.