Think how much publicity it would bring to JMJ, who is now sadly forgotten in these isles. Come on JMJ, light up London and show us that you're still here for us
I think if London is too expensive/logisitical nightmare then perhaps Jarre should try Croydon: A City In Concert...
Take a look at the snaps at the link below, especially the third pic. The buildings in Croydon are already illuminated... it's just the ticket for Jarre!