Cancel insurance?

[Borderbairn]

Sorry if this is a stupid question. I have just been informed that my holiday to Austria in July cannot go ahead as planned as Ingham's have been unable to find a replacement flight following the collapse of Flybe. I have been offered a full refund which I am taking rather than a voucher. My question is do you know if I would be able to cancel my insurance as it is no longer required. I don't want to be waiting in a long phonecall to insurers if it's a no.

[Borderbairn]

To answer my own question, got through to Staysure on first ring and was offered a voucher or partial refund with a £25 admin fee. I am so relieved to get refunds for my bookings but can't help feeling blue that our holiday is gone.