The following is the e-mail response from Zizzi when asked which of their menu items are vegan:
Thank you for your email.
Please find attached our customer information sheet regarding the
suitability of our menu.
We are able to make modifications to certain dishes to suit your
requirements and i would advise that you speak to the manager on duty regarding this.
I certainly hope you find this information useful and if i can be of any further assistance, please do not hesitate to contact me.