Which do i do first? SBL or APM?

Hi
I just need some advice as to which exam to do first, SBL or APM? I did PM in Dec 2020 so i might be a little rusty on it but im sure when i statt studying APM I’ll start to recall some things. I already did SBR and am writing AAA ina few days. I’m not too sure what the syllabus of SBL contains so im not sure if I should do SBL or APM first or if there are some things in one paper that would be useful when preparing for the other. What do most ppl recommend and do?

Thanks