Transport for LondonWin Hard Rock Calling tickets
The music event takes place in Hyde Park on Saturday and Sunday.
There are six pairs of tickets up for grabs for Saturday - including one pair of guest/VIP tickets, which gives you access to an exclusive hang-out area with band guests, media, and other VIPs.
There's also another six pairs of tickets to be given away for Sunday - again, including one pair of guest/ VIP tickets.
To plan your journey to the event, go to tfl.gov.uk/journeyplanner for door-to-door directions and a free downloadable map.
For your chance to win one of 12 pairs of tickets, simply answer the following question: What online TfL tool would help you plan your journey to the event?
Email your answer to metrocompetitions@tfl.gov.uk, with 'Hard Rock Calling' in the subject field, together with your full name, address and telephone number by 17:00 today.
The winners will be chosen at random from the correct entries.
