I have an interview in Oxford tomorrow at 11am. Due to an important doctor's appointment, I won't be able to get to Redbridge Park and Ride until 10am. Does this give me enough time to get to St Clement's Street? I don't know how bad the traffic is in Oxford at the moment. I was planning to get off at St Aldate's and change to another bus that goes down St Clement's St (looks like quite a lot do).