Trades unions have announced they'll be sponsoring an anti-cuts gig organised by Cymdeithas yr Iaith Gymraeg (The Welsh Language Society) during the National Eisteddfod in Wrexham.Unions including the NUJ, BECTU, PCS, the Musicians Union, the Writers Guild, Unison Cymru and the RMT will take part in the event and are encouraging their members to come to the evening'