Spousal Visa App: Sponsor's (Husband's) UK Passport Expired. Use US Passport?

Thank you, larrabee! 

No, it's perfectly fine.  This is the place to do it and all, problems large or small, are equally valid. 

So true that it's much easier to move to the US! Thank goodness we meet the UK requirements though. Thanks again for all the helpful replies. 

It is MUCH easier to move to the US and a heck of a lot cheaper!  But you meet the requirements for the UK, so shouldn't be too big of a pain.