*comes over all maternal as has own cycling offspring at university*
1. Get a bike that fits you
2. No, you don't need an MTB or suspension if you're on road/tarmac
3. Hybrid sounds better for what you've described
4. Even with £300 you're going to be limited in your choice, but should get something decent at entry-level
5. Avoid a certain national chain known affectionately as H*lfrauds by many a cyclist
6. Shop around.
7. Locks - nothing is going to stop a *determined* thief, but you can deter the opportunist thief. The best way is to have a mutli-pronged approach to keeping your bike safe.
- Check at your new place of education if you can have access to secure cycle parking where you can lock your bike and the bike shed itself is locked.
- Park your bike next to something more attractive to thieves.
- Use more than one lock.
- If you have insurance, check the requirements of the insurance policy - some dictate which model/make lock you are required to use and how you use it e.g. bike locked to an immoveable object.
- This is what Family Wafflycat do: D-lock round bike stand and bike frame. Cable lock round bike stand rear wheel. Another cable lock round bike stand and front wheel. Remove lights, computer etc and take those with you.
8. Accessories - remember to budget for locks, lights, reflectives, waterproofs, inner tubes, pump, puncture repair kit... and the like