Members of the IWGB went on strike last year.
Workers at the Royal Society of Arts (RSA) have voted to accept an improved pay deal after months of negotiations and strike action.
Members of the Independent Workers Union of Great Britain (IWGB) went on strike in September 2023, for the first time in the charity’s 270-year history, followed by further industrial action as negotiations continued.
The union said the agreement includes pay increases that will see lowest paid workers awarded 12.71% increase since the beginning of negotiations last year, as well as an additional one off payment of £500 for all staff in the bargaining unit.
A trial of quarterly meetings with union representatives and RSA management will also take place, after the IWGB achieved formal recognition in March 2023.
A joint statement from both the IWGB and RSA following the acceptance of a new offer said: “Members of the IWGB working for the RSA have voted to accept an improved offer. This has ended the dispute between the RSA and the IWGB.
“The RSA and IWGB will work constructively and collaboratively together going forward in the interests of improving industrial relations and in support of the charity's mission, including the union ceasing campaigning against the RSA and its officers with all partners, fellows and others involved in the RSA's work.”