Lufthansa is in the giving mood again. Get a £20 or €20 discount voucher for free for flights departing in United Kingdom, Germany, Spain, Norway and many more.
Update:If you're from Italy you get a even better voucher: Save €20 off your next Lufthansa flight. Thanks to vlad for sharing the link! Click here.
Update3: Lufthansa is now offering €20 vouchers for Belgium, Spain, Italy, Sweden, France and many more. Click here
The voucher is valid for travel between 13th December 2012 and 31st March 2013. You have to use the voucher by 31st January 2013.