As you can see from the articles below, nothing much has happened to the West and Bristol Arcade since it was built in the 1950s. But the history of the site before that is interesting. 1hr 20m.
http://readingonthames.com/2017/07/23/175-friar-st-past-present-and-future/
2006 article https://www.getreading.co.uk/news/business/7-million-revamp-bristol–4261584
2017 article https://www.inyourarea.co.uk/news/flats-and-shops-plans-for-bristol-and-west-arcade-among-reading-applications/