https://www.mbplc.com/investors/shareholderinformation/faqs/
16. I hold my shares via a nominee company, how do I get a voucher booklet?
In the first instance, you should request your vouchers direct from your nominee company rather than Mitchells & Butlers. We are only able to provide you with a shareholder booklet if your nominee company is unwilling to apply for the vouchers on your behalf.