EnglishLove

Hello, I've asked a question before in regards to the same topic and have gotten mixed answers for the k-1 visa. I've even called multiple immigration attorneys and they won't help until I've paid a $2,500-3,500 retainer. My fiancee has one charge on his record when he was a juvenile for having a knife. I know that UK counts cautions as convictions (which coming from the US is ridiculous to me) but he has two cautions for common assault when he was 14 and then his charge which he received no jail time or fine, only 9 months probation. He then has a caution for common assault in 2012 and then another caution for receiving stolen goods because he bought a motorcycle that was reported stolen. He was able to prove to the officer that he was completely unaware so he wasn't charged but did receive a caution because he was "in possession" of it in 2015. My question is, during the interview process, will they let him explain what happened or just look at it and automatically deny? Should I write something up explaining the situation so they are able to reflect back on it once he leaves the interview? I guess I'm hoping for input from filers in the UK that have had similar situations. Thank you!