I was under the impression that only convictions which lead to 12 months or more in prison could seriously affect the outcome of a visa application. I think even for the nature of the conviction, taking into account that he only served 3 months in prison (and was allowed to work) and also that the offence was now 8 years ago, you should be fine.
I'm sure you must have talked about in your statements how your husband is of good character and that it was a once off offence. It was a long time ago and I'm sure your husband has still been working since then and can demonstrate that he is a good member of society; don't worry
Someone here might have some experiences to share.
I just got this on the immi site: Substantial criminal records A person is deemed to have a substantial criminal record if they have been:
- sentenced to either death or life imprisonment
- sentenced to a term of imprisonment for 12 months or more
- sentenced to two or more terms of imprisonment (whether on one or more occasions), where the total of those terms is two years or more
- acquitted of an offence on the grounds of either unsoundness of mind or insanity and, as a result, the person has been detained in a facility or institution.
Your husband does not have a substantial criminal record.