I have been granted UK ILR today successfully at Croydon, London.
I am sharing my experience so that it might clarify queries for others.
I got my UK Tier-2 workpermit valid from 18 Dec 2008 but I landed in UK only on 9 Feb 2009. I renewed it by Dec 2010 for 2 years and moved to Tier-2 ICT Established staff. Later I renewed it again by Jan 2013 and moved to Tier-2 ICT Long term staff.
I APPLIED UNDER TIER-2 WORK PERMIT CATEGORY.
- UKBA appointment booking confirmation mail - print out - MUST
UKBA payment confirmation (£1426 for 1 applicant) - print out - MUST
SET(O) form - ensure that you have filled it with a black pen - MUST
2 passport size photographs - as per UKBA guidelines - MUST
Employer letter stating that you will be employed for unforeseeable future along with SOC code, annual salary and annual leave entitlement -- MUST
Last month i.e. most recent payslip - attested by employer payroll manager - MUST (better to have at least 6 months payslip)
Life in UK pass result - MUST
English test result - MUST
Last month i.e. most recent bank statement where you are salary is paid - attested and signed by bank in all pages - MUST (better to have at least last 6 months bank statement)
Passport - MUST
Current biometric residence permit - MUST
P60 - attested by employer payroll team - if available
Original workpermit initially offered - if available
Any utility bill or council tax showing correct name and address - if available
All the best!