You apply online I think, you will be interviewed and if there is any illegal stay or anything adverse in your history, unlikely you will get the visa, which I understand also costs over £100.
You also need evidence of funds, proof of travel, who you are visiting, evidence of ties in the UK etc.
Is the purpose of your trip a holiday or......?
Char (CR001 not Casa)
In life you cannot press the Backspace button!!
Please DO NOT send me a PM for immigration advice. I reserve the right to ignore the PM and not respond.