The Assistant Psychologists in our service (NHS Adult Mental Health) are required to be competent at data collection, statistics, analysis and data presentation. That includes SPSS and Excel. The qualified clinical psychologists direct the work, check it and sign it off, but the assistants do the work. They are heavily involved with administration but also have some clinical work, which usually is augmenting the work of the Band 7s and upwards.
We test for this as part of our interview procedure, and it has become the best way to determine both who is succesful in role but also who goes onto a DClinPsy afterwards. I think this is because our AP jobs are built on (and develop) the competencies that most DClinPsy programmes look for. From my own memories, it is incredibly tough to get through a DClinPsy if you are weak at research as it is a doctoral programme, and some courses will even have exams around this skillset.
Though I qualified a long time ago and am now a head of service, I still use stats. If you don't know your research methods it can limit your progression once you are qualified and practicing as a psychologist, and you may not be taken that seriously in specific contexts. You may be able to sit in a therapy heavy role in your early career, but above Band 8a jobs (and even for some of those roles) you are going to be managing teams and working with data to justify your service, your key performance indicators and the development of that service. If you don't know data and statistics that is going to be nearly impossible.