It’s not written on their vouchers but the 1 for 1 voucher is only applicable for dinner (which is incredibly frustrating and should be written on the vouchers)

Thanks for the info!
I used it for their set lunch before, I suppose it’s a more recent change (pretty annoying when places change their rules without updating Burpple…)
I see, I don't like visiting annoying places, so hopefully that's some pressure on them to update their stuff haha