Please refer below dates
1st Visa: 1st Oct 2010
First entry: 19 Jan 2011 (>90 days of issue of visa)
Then after 3 weeks I went back to India and came back on 16th April. Joined job on 18th April 2011.
It was approx 2 months and 2 weeks I was not in UK and no job/salary.
Visa extn: 10th Aug 2012
Valid till: 9th Aug 2015
Certainly, i need another extn. (Let me knwo if there is any measure of avoiding

My question is, when can I apply for ILR at the earliest. 19th Jan / 18th April?
Also, what are the convictions which can be trouble for ILR. e.g. I was stopped and my details were noted when tail-light of my car was not working. Can such things be a trouble?
Appreciate your reply.
Thanks,
Gurmeet