Open Days
Nothing beats actually visiting a place! You will need to book in advance to attend an open day, but this will enable you to attend subject talks, have a campus tour, view accommodation and facilities and talk with current students. If you can't visit in person, check out the university website for virtual tours and talks. Many universities use UniBuddy to enable you to talk with current students about their experience.
Students with an offer will be invited to attend Offer Holder or Applicants Days so don’t worry if you have applied but not had the opportunity to attend a previous Open Day.
Opendays.com - website to search the relevant Open Days