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.
On 26 January 2018, traffic restrictions and diversions will be in place in Vienna city centre from 4pm, due to demonstrations and marches to coincide with the holding of the Akademikerball in the Hofburg. Some city centre public transport routes will be affected and delays can be expected. You should follow the advice of the local authorities.
It’s illegal in Austria to wear in a public place any clothing or object that conceals the face and makes facial features unrecognisable. See Local Laws and Customs.
Immigration controls may temporarily be in place at some road and rail border crossing points with Germany, Hungary, and Slovenia. You should carry your passport with you when crossing the border into, or from Austria, monitor local media and check with your transport provider or the Austrian Railways (OBB) website for updates.
There are complex driving laws in Austria, especially for caravan and motor-home owners. See Road travel
There’s a danger of avalanches in some areas. Even during summer time this danger still exists for snow covered areas. See Skiing
Around 774,000 British nationals visit Austria each year. Most visits are trouble-free.
Don’t carry your passport around with you. Leave it in your hotel safe and carry a photocopy instead. See Local laws and customs
Terrorists are likely to try to carry out attacks in Austria. You should be vigilant and follow the advice of local authorities. See Terrorism
If you need to contact the emergency services 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. Make sure this covers any winter/mountain activities you plan to undertake.
Source Article from https://www.gov.uk/foreign-travel-advice/austria