No visas required for British passport holders. Passports are required – validity to cover duration of visit (preferably 6 months beyond your stay).
Take out comprehensive travel and medical insurance for the duration of your stay.
In common with many countries there is a requirement in Serbia to be able to identify yourself. A passport, or a copy, or a document with a photograph on it should be carried at all times.
At the match
All supporters will be searched prior to entering the stadium and items that could potentially be used as missiles will be confiscated, such as lighters or large amounts of coins.
There will be a visible police presence in and around the stadium.
From Belgrade to Novi Sad by bus would be easier. The main bus and railway stations are close together and in the city centre. It takes approx 90 minutes by bus. Trains can be slower. From the airport to Novi Sad by taxi only.
There are fines for the drunk and disorderly which could lead to fans being locked up and missing the match.
You are advised to hold a form of ID at all times.
You should be alert to the risk of petty theft and for pickpockets and bag snatchers in crowded areas (especially at the airport, main railway or bus stations).
Take care not to leave jackets or bags containing wallets, passports or mobile phones unattended in restaurants and bars.
Penalties for drug use or possession are severe regardless of drug class.
Tap water is drinkable but bottled water is preferable.