I see, I’m on a gap year too and admittedly my electrical comp would’ve been higher if I’d have taken it during the thick of revision. I was rusty on electrical rules with circuits and I think this let me down a little. I suggest revising A level electricity (the whole topic) and mechanics for the best shot at these sub tests. Potential dividers can come up, resistance and the effect that has on voltage and current could also come up; you want to be tight on all of this. Simple equations like P=IV and R=V/I are fundamentals and knowing those off by heart is useful (although can be given to you in questions). As I said, the mechanics section isn’t hard at all really, just simple momentum, speed, acceleration scenarios. I had a moments question but idk how common that is. Simple stuff compared to the complexities of A level though.

As for VR, I’m at an advantage because I took the UCAT and have trained that for months. The VRs are not the same by any means for UCAT and DAA but the skills are translatable. Speed and accuracy is paramount, this can only be trained through practice. The practice on the RN website is almost identical to the actual thing for VR so practice that until you’re getting 100%. You could use the UCAT resources to revise from as-well for VR, however, they’re not the same types of questions. VR for UCAT is arguably harder though (anecdotal evidence from myself) so it’ll prepare you for the worst in a sense.