Local Compliance telephone interview

My husband received a Local Compliance telephone interview letter today, the interview is in 2 weeks time. My husband is in the support group of ESA and also receives PIP. I'm his full time carer too. I think it's just to check details because they want bank statements to hand. The only difference is since first claiming in 2011, I opened a new bank account last year. I didn't have one previously because when the kids were little the tax credits went into a post office account, but since they've all grown up and the benefit stopped, the post office closed the account. So I originally thought I'd open one to have my carers allowance paid into it.
Long story short, I ended up not using it because as I'm my husbands power of attorney, I didn't see the point in using it because I do everything from my husbands bank. All the bills go out of his bank, and it's easier for me to keep a track of it all. I've downloaded all the statements from my account if they need access to them, but there's the grand total of £1.30 in there for the last couple of months. 
The only other thing is we fell out with the new neighbours over their yapping dog. She's very vindictive and called the police, but when the officer came, all she said was to not have anything to do with her and keep a record of the noise and report it to the environmental health. Thankfully since it all happened she's kept the dog quieter so we haven't had to. I don't tell her anything about us. She doesn't know we're on benefits, but she does know my husband is disabled. When he's well enough to walk, I try and get him out of the house just to go for a short walk, but he doesn't want to go now just in case she's said something to benefits. He's basically a hermit now, not wanting to leave the house. I'll be happier when this is all over with, but I suspect this has knocked his confidence.
My husband did ring the number on the letter after I told him just to put his mind at rest, and the man on the other end told him to stop panicking. All he said was are you on benefits, and my husband said yes, and all the man said was it'll be about that. He said there's 2 of them that do the interviews, he does the normal ones and the other one does the serious ones. 

I know I shouldn't worry, but I do. I take the worry for both of us