Panels from top to bottom: (B − V) colour index as derived from AAVSO data during Dipol-2 observation epoch; the middle panel shows the measured absolute polarisation degree in percentage and the bottom panel shows the recorded position angles for the polarisation measurements. The filled circles shows the data for the B-band, hollow circles – V -band and filled triangles – R-band. Days since outburst are marked along the top x-axis. The error bars (±1σ) are smaller than the plotting symbol for the WHT data (days 111–114 post outburst).