I applied online. I interviewed at Barclays (London, England) in Dec 2017
Interview
The final onsite interview is quite tensive with 4 individual interviews, one trading game and one math test. The 4 individual 1:1 interview include two math, one general interview with D or MD in the bank and one coding interview
First stage online tests. For numerical test, be quick and make sure you practice. There are resources available online. It is to do with analysing data very quickly and doing basic calculations under time limit.