Hi Wilfried, Thank you for the pieces of info, but I'm so disappointed that I do not know if I'll travel to London ! If somebody wants a return ticket (Paris-London) I'm ready to sell it at cost. pierre.courbouleix@xxxxxxxxxx MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.