Bloomberg’s financial terminals went down globally on Friday, resulting in disruption for traders who rely on the data machines to analyze and trade securities and causing the U.K. to postpone a scheduled multi-billion buy-back of government debt.

Traders said the terminals went dark shortly after European markets opened. By midmorning, the U.K.’s debt-management office said it had postponed a scheduled buyback of government debt, citing ongoing technical issues with a third-party platform supplier, which a spokesperson confirmed to be Bloomberg. Read: Bloomberg terminal goes down, traders get up to fun