You’re holdings in a nominee , so you don’t receive the vouchers the nomone does.
T212 (if they want to - because it’s a pain to administer) can provide you a proof of beneficial ownership statement. That SOMETIMES is accepted to receive shareholder benefits in the company in question. Whether it works for m&b In your local pub is open to question. Same with your discounts in next, Wetherspoons, BA etc…etc…
Basically… ask T212… get statement… show to your local bar tender and see what face they pull at you?