Workers at the National Gallery in central London, the National Museum of Wales and National Galleries of Scotland are set to strike together next Saturday.
Strikers at the National Gallery have voted to bring forward their planned all-out strike after bosses announced their privatisation plans could go through as early as next Monday.
Over 120 strikers and supporters attended a rally outside Amgueddfa Cymru-National Museum Wales on Saturday in protest against museum bosses plans to scrap weekend allowances for the lowest paid staff.
Strikers at the National Gallery in London celebrated 50 days of strikes against privatisation on Monday—and could be headed for all-out action in August.