London - Staff at Queen Elizabeth II's Windsor Castle are threatening to take industrial action over pay, a trade union said on Monday.
If it goes ahead following a ballot, the action would be the first ever by staff working for the royal family, according to the Public and Commercial Services Union (PCS).
The union claims that already low-paid staff are currently expected to carry out extra unpaid duties such as giving tours and acting as foreign language interpreters at the 900-year-old castle west of London.