What visa do you have in coming here? If you are on spouse visa, there are quite a number of IT jobs available here. But it still depends on where you live. I also worked in IT industry for almost 8 years before coming here. When I was browsing for possible job opportunities, most IT jobs are located in London, the Midlands, Cardiff and other major cities in the UK, and I could only find very few near where I live.
About the requirements, well obviously you need a valid visa to work in the UK. Also, NI (National Insurancce, http://www.hmrc.gov.uk/ni/intro/number.htm) is a requirement too. Resume or CV is also needed. Companies would conduct interviews and CRB checks as well.