There will be no change to the rights and status of EU nationals living in the UK, nor UK nationals living in the EU, while the UK remains in the EU.
Terrorist attacks in Romania can’t be ruled out. See Terrorism.
Most visits to Romania are trouble-free.
If you need to contact the emergency services in Romania call 112.
If you’re abroad and you need emergency help from the UK government, contact the nearest British embassy, consulate or high commission.
The Overseas Business Risk service offers information and advice for British companies operating overseas on how to manage political, economic, and business security-related risks.
Take out comprehensive travel and medical insurance before you travel.
Source Article from https://www.gov.uk/foreign-travel-advice/romania