I have an Elite membership, and when traveling on THY or a Star Alliance ticket with my Miles&Smiles number (Revenue Customer) I am able to use my boarding pass to access fast-track security lanes, say for example, in London Heathrow T2. These are usually signposted as Star Alliance Gold

So my question is, if I am traveling on BA and, therefore, a non-revenue customer, on an economy class ticket. Can I use my digital membership card to use the fast-track lane?

Usually, you need to scan your boarding pass. How would this work at the automatic gate? Do I need to speak to a person?

Can I still do this with accompanying family members?

Thanks for any help you can give.