The demonstration in London starts this Saturday at noon and there will also be rallies in Cardiff and Glasgow.
As PCS HMRC members walk out of the closure-threatened Ealing office at noon next Wednesday (20) PCS General Secretary Mark Serwotka will join them on their picket line.
PCS is investigating problems with submitting motions and putting in place procedures to ensure correctly submitted motions will be included in conference agendas.
A strike by PCS members in Universal Credit over unmanageable workloads has been strongly supported with a great turnout on picket lines and a solidarity message from Labour leader Jeremy Corbyn.
To coincide with the opening of the PCS postal pay ballot next Monday (18) we are holding a Facebook Live broadcast from Cardiff at 5.30pm on 21 March.