* University of West London (UWL): Has campuses in Ealing and Brentford, both easily reachable from Slough by train. This is probably the closest major university option.
* Brunel University London: Located in Uxbridge, also accessible by train from Slough.
* University of Reading: A larger university further afield but still commutable by train from Slough. It's a longer journey than UWL or Brunel.
* Several further education colleges (FE Colleges): Slough itself and the surrounding areas have several further education colleges offering vocational training and A-levels. These would not be universities, but are valuable local options for post-secondary education. To find these, a specific search for "further education colleges near Slough" would be needed.
The best option will depend on the specific course of study and the student's preferred mode of transport and commute time.