The best bikes for a university are bikes that are twenty years old, and look it. They are often available at yard sales, police auctions, and charity resale shops. An expensive bike at a university will be a visitor, not a long-term resident.
If possible, keep your bike with you after dark. Don't leave it outside at night in a university town. At www.soldsecure.com
you will see a list of the locks approved for insurance in the UK. Get two of the locks on the "Gold" list. Lock the rear wheel, directly behind the seat tube to a steel pole set in concrete, or steel fence set in concrete. Use the second lock to attack the front wheel to a second steel pole, or to the frame. Then, wrap a cable lock thicker than a finger through both wheels and the frame.
The cheapest locks likely to get a "Gold" rating are sold under the "OnGuard" name in the USA. They are sold under the Magnum name in the UK. The UK brand of Paramount Plus also earned a gold rating.
Pick a location that is well lighted at night and with lots of people around. Any lock can be cut by a Pro who gets ten minutes of peace and quiet. Pick a spot where those ten minutes do not exist.