for
it is the same as the forms you submitted for sinp, well, since you or your family members have not stayed for 6 months consecutively then you don't need the police clearance from UK. Write an explanation letter to explaining why your visa was cancelled, your passport expiring in 2021 as long as it has more than 6months validity then you are fine.
be honest about any visa denial if any
mistakes to avoid:
1. don't give gaps between dates on your schedule A same applies to your family
2. fill forms in all honesty
3. SIGN every form don't forget it
4. your accompany family members over the age of 18years need to fill out individual schedule A forms
5. Have police check for all accompany family members over 18.
6. follow the exact passport picture requirement by ircc for you and your family members (pictures should not be longer than 6months) 2 copies each, stamped with date and location of the studio. write the name of the person in the pics and date of birth on pic one then leave the other pic blank.
That's all I can remember for now if you still have confusion follow this link:
https://www.canada.ca/content/dam/ircc/migration/ircc/english/pdf/kits/forms/imm5690e.pdf