Royal Museum Greenwich's Prospect members have voted in favour of strike action, which will be taking place on 11 and 12 August.
RMG plans to keep the National Maritime Museum, Royal Observatory and Cutty Sark sites open to our visitors.
The Queen's House, Astronomers Take Over and planetarium will be closed on both 11 and 12 August.
The Partial Solar Eclipse viewing event at the Royal Observatory on Wednesday 12 August will run as planned.
Official statement from Royal Museums Greenwich
Royal Museums Greenwich has been in constructive negotiations with Prospect including a formal ACAS conciliation meeting in July. Those negotiations have already produced a two-year pay settlement covering 2026/27 and 2027/28, which has been agreed by Prospect and implemented.
The remaining areas of dispute relate to a small number of non-pay matters on which the Union and RMG have already had a meeting with ACAS who recorded progress and a constructive way forward as RMG made a series of commitments, including engagement with the London Living Wage Foundation.
Prospect members have voted in favour of strike action, and we have received notice of discontinuous strike action on 11 and 12 August. We are disappointed by this outcome, particularly given the progress which has been made.
Royal Museums Greenwich plans to keep the Museum sites open to maintain the provision of service to the public.