Hey Iain, you will certainly need your tickets to get in. I would suggest giving Isobel at Peter Auto a call, she is very helpful....it appears there have been several issues with tickets this year...
Isabel Lebon
Directrice Associée
Peter & Associés
103, rue Lamarck | 75018 Paris France
Tel: +33 (0)1 42 59 73 40
ilebon@peter.fr | peterassocies.peter.fr