You can apply for any visa for which you meet the regulations, e.g. a temporary work visa, or Residence under SMC. When you have to answer the questions about Character, you need to declare this past conviction. Almost certainly, you will be told you have to apply for a Character Waiver.
http://onlineservices.immigration.go...nual/35058.htm This means that you have to write a letter describing whatever the incident is in detail, admitting full responsibility for your part in it, and showing how, since then, your life has turned around and you would not now do the same kind of thing again. You need to submit this with character references from people of good standing in your community who know you personally, who testify to your now being a useful member of society.