things to do before spring week applications?

• Spring week applications begin as early as end of August/ start of September, so it's important to have your CV and cover letter template ready for some of the more rolling banks. The first few weeks of uni will be busier than you realise in meeting new people, starting your courses, and settling in, so it's helpful to get these elements sorted before you start. 
• With regards for online tests, you don't need lots and lots of practice - just become familiar with the styles and have a few attempts, so that you are prepared for what comes up but for some of the rolling applications, it could be useful to start practising tests before uni.
• You're right regarding online certificates as they mean nothing.
• Other things you can do to prepare is look through the different divisions of a bank and perhaps reach out to some employees to learn about what they do, so that you can decide which divisions you're most interested in applying to.
• Interviews will come later down the line in late October/ November but prep for these will include standard questions like "Tell me about yourself" and other motivation and behavioural questions regarding your skills, CV, and why you want to work in this industry.
• Given that they aren't expecting first years to have any relevant industry experience, accumulating any experience over the summer like a part-time job, tutoring, volunteering is beneficial in demonstrating the key skills required that you will be asked about in your interview

BUT most of important of all: enjoy the long summer!