Left: Polarised intensity of NGC 3125. The contours show 5σ increasing with a factor of 1.5 plus the mean of the background (σ = 1.54 μJy/beam and mean = 39.9 μJy/beam). Middle: Degree of polarisation of NGC 3125 with polarised emission clipped at 5σ (σ = 1.54 μJy/beam) with subtracted background and total radio emission at 2.1 GHz contours at 5σ, increasing by a factor of two (σ = 25 μJy/beam), overlaid. Right: Hα map of NGC 3125 with non-thermal radio emission contours at 3σ, increasing by a factor of two (σ = 25 μJy/beam), overlaid. The magnetic field orientations are shown in green and scale with the polarised intensity. For all three images, the circular beam of 15″ is shown in the left corner.