  The post-common envelope binary V471 Tauri has been an object of interest for
decades. V471 Tau shows various phenomena due to its evolutionary state and
unique properties, e.g. its magnetic accretion and eclipse timing variation
(ETV). Previous authors explained the ETVs by different, sometimes
contradictory theories. In this paper, we present and analyse the variability
of the eclipse timing of this star. We observed V471 Tauri over the last ten
years and covered the second cycle of its period variation. Based on our
analysis of the presented data, we assess the possible existence of a brown
dwarf in this system and derive its orbital parameters. We compare the results
of our dynamical modelling to the solution predicted by Applegate-mechanism
theories, which have been developed in recent studies. We found that the
observed ETV cannot be explained only by the presence of additional components
to the binary.
