I got ILR for me/wife/kid from croydon PEO yesterday. Mine was WP+Tier1 with 5 yrs and less than 180 days absence..
Docs asked my caseworker
1) Application
2) Photos
3) Passports
4) all 5 yrs P60's
5) UK KOL test
6) 3 months bank statements
7) Employer letter

Nothing else apart from this, not a single docuemnt for my dependants....
Hope this info will be useful for others...let me know if you need any further info....