British Army troops deployed in London after 2017's terror attack in Manchester. DANIEL LEAL-OLIVAS/AFP/Getty Images

The British Ministry of Defence has put 3,500 troops on standby to “aid contingency plans” for a no-deal Brexit, a spokesman told CNN on Thursday.

The contingency plans are part of Operation Redfold, the British military’s crisis management operation in the event the UK crashes out of the EU without a deal. A spokesman also told CNN that Pindar, the UK’s military bunker based under the Ministry of Defence, became “operational” on Monday as part of the operation.

Pindar is a defense crisis-management center used to plan for significant UK operations. In the past it was used to support preparations for the 2012 London Olympics.

In a statement sent to CNN, a Ministry of Defence spokesman said: