Due to its prestige & therefore the control C&G have on the actual exam, very difficult to get anything else really for  practice,

Sparkyninja did some content on You Tube although nothing for Ad 2.

https://www.youtube.com/watch?v=te9f5jyjvsM

IET Academy does a course on the calcs which is good  

https://academy.theiet.org/electrical-design-calculations-and-considerations

Look at the examiners reports , not sure if this is what you mean for the past papers example below

https://www.cityandguilds.com/-/media/productdocuments/building_services_industry/electrical_installation/2396/additional_documents/examiner-reports/2022/2396_chief_examiners_report_march_2022_final-pdf.ashx

quoting the fact you have past papers is a no no, this is not allowed under C&G rules so that's why I'm assuming you mean examiners reports.

Obv's you can only use 7671 , OSG & GN3 in exam so ensure you fully understand the calcs , how to apply them and limitations of design practices as well as the key areas of the book as well as speed in searching in 7671. I used the e-version vital source app via electrical IET to get the book in my head better than pdf then you can practice on the book later which I assume is flag tagged for ease ? 

https://www.learninglounge.com/social/blog/post/1923224326/video_pimp_regs_exam_ready

Not sure if you are a recent college leaver or grad but if not this is going to be one of the hardest exams you will take. I have done lots in my time even degree exams and this is up there at the top, probably not level 7 but as challenging as anything below that.

Don't forget to make sure you get that project done, heard loads of stories of people not doing that and not getting the ticket as they say 40 hours but that's if your a seasoned designer for everyone else easily 70 hours if not more. I found using electronic means i,e, Visio or CAD for all drawings was quick and easier than paper and complete everything in word, bind as a pdf prior to printing in a nice single file. Also sharing projects is also a no no 

Nice little touch is the digital badges from C&G put on LinkedIn or here as there aren't many quoted about so makes you stand out.

https://www.credly.com/org/city-guilds/badge/level-4-award-in-the-design-and-verification-of-electrical-installations-2396-01

Also don't forget to push for tech grade on ECS when you can, should align with EngTech Elec so you get TMIET if you haven't already.

Not much more to add expect, Good Luck, as with this exam you will need it!

check this as well www.youtube.com/watch

check this as well www.youtube.com/watch