  Low-frequency radio observations of galaxy clusters are the key to detecting
the diffuse extended emission associated with them. The presence and properties
of such radio sources in galaxy clusters reveal the existence of magnetic
fields on a large scale and allow theories to be tested concerning both the
origin of relativistic particles in the ICM and their propagation.
  A deep radio bservation of the A2255 galaxy cluster was carried out at 85 cm
with the WSRT. The good UV-coverage and sensitivity achieved by these
observations allowed us to image the complex structure of the low-brightness,
extended cluster sources (radio halo and relic). These sources show a larger
extent than what has been imaged so far at this frequency, with two new
structures located SW and NW of the cluster center and at projected distances
of 2 Mpc from it. The physical properties of the newly detected structures,
together with the active dynamical state of the cluster, support a connection
with large-scale structure (LSS) formation shocks.
