I worked at Nationwide Building Society full-time (More than a year)
The working hours and pressure is less than most of the big banks, generous support on learning and development (CFA study and exams etc), there are opportunities to move up or jump to other banks if you doing a good job in a good team
lower salary than most of the big banks, more local and closed than most of the big banks, not providing T2 work visa for foreign nationals
I applied online. I interviewed at Nationwide Building Society (Royal Tunbridge Wells, England (UK)) in April 2017.
Straightforward process consists of 3 steps, online application and aptitude test, telephone interview and interview. Interview was with 2 managers who work for the same branch the post is advertised for. Interview last about 1.5 hours. At the end they discuss the current salary, your current location proximity to the bank which I believe they seriously consider to make the final decision. So, please be very careful.