Have you checked with the insurance company,if they may be covered still as you bought them whilst still insured?

Rha Mo makes a good point - do check.

Your credit card might have 'free insurance' included - do check as many people forget about this.

As for claiming back under Section 75 of the Credit Card Act - no. The company have kept their side of the contract, and it is not their fault your insurance ran out. Sorry. You could always appeal to the nicer side of their nature. If nothing else, they might carry over your deposit to a future booking.

I agree that you should check. If you have proof that your husband was 'unfit to travel' whilst you were still insured then you may be ok.