JPC, it's custom, here you go:

http://www.creativepro.com/article/agent-provocateur-taps-house-industri...

P22 Imperial Script is a copperplate script with a similar bounce.

The original was Shelley Script if I remember correctly.

http://www.houseind.com/index.php?page=clothing&category=knickers

bj's link was giving me errors:

http://www.creativepro.com/article/agent-provocateur-taps-house-industri...

Thanks for your help guys!