Thanks, KF and Larrabee. Shame that the answer is what I expected.
Obviously we're hoping to return to the UK together, but depending on how long the process takes he may have to go ahead. As it is, he will still be in the US and not have returned to the UK permanently yet on the day we apply. The situation as it is on the date of application is what counts, correct?
If he has to go over ahead of me to start his new job while waiting for the visa for be processed, that wouldn't affect the application, would it?