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Please refer to the link where the guidelines indicate that your visa would be refused automatically under mandatory grounds where within the 24 months preceding the date of the application, you have been convicted of or admitted an offence for which you have received a noncustodial sentence or other out of court disposal that is recorded on their criminal record. The key here is " within 24 months and recorded on your criminal record". However, if it wasnt recorded the Home Office may still refuse under discretionary grounds but at least it is not automatic.
Go to page 5 in this link
and page 65 in this link