Mbna upgrade vouchers

Apologies if this has been asked before, but tried search for the answer.

I've had an upgrade voucher posted to my account, but theres nothing that says the T and c's anywhere.

How long do you typically have to use these? Is it 1 year or less or more?

Thanks for the help

You have 12 months from the date the voucher hits your account to book your flights. The flights themselves don’t have to be within that 12 months.

So if the voucher hits your account today you could wait until next July to book a flight for June 2020, if you were so inclined.