This question already has an answer here:
So I am US citizen and I want to travel to the UK but I heard you have to wait 12 months after you have gotten off probation. My misdemeanor only came with a fine, but I wanted to get it removed from my record, so I asked for a withheld judgment which they gave me 6 months of unsupervised probation before I could apply to have it dismissed from my record. So my trip date falls 3 months short of a year from the end of that probation. I want to know that since I got the misdemeanor dismissed will that affect me? Should I wait the year or can I go earlier?