  The Sun is an active star that often produces numerous bursts of
electromagnetic radiation at radio wavelengths. Low frequency radio bursts have
recently been brought back to light with the advancement of novel radio
interferometers. However, their polarisation properties have not yet been
explored in detail, especially with the Low Frequency Array (LOFAR), due to
difficulties in calibrating the data and accounting for instrumental leakage.
Here, using a unique method to correct the polarisation observations, we
explore the circular polarisation of different sub-types of solar type III
radio bursts and a type I noise storm observed with LOFAR, which occurred
during March-April 2019. We analysed six individual radio bursts from two
different dates. We present the first Stokes V low frequency images of the Sun
with LOFAR in tied-array mode observations. We find that the degree of circular
polarisation for each of the selected bursts increases with frequency for
fundamental emission, while this trend is either not clear or absent for
harmonic emission. The type III bursts studied, that are part of a
long--lasting type III storm, can have different senses of circular
polarisation, occur at different locations and have different propagation
directions. This indicates that the type III bursts forming a classical type
III storm do not necessarily have a common origin but instead they indicate the
existence of multiple, possibly unrelated, acceleration processes originating
from solar minimum active regions.
