White Mark's extensive experience in acoustics and design is widely recognised both within the music, film and television communities, and beyond. This knowledge is often called upon by organisations requiring expert advice and expert witness testimony for legal and Government proceedings.

White Mark's most notable work in this field was undertaken for Grand Central Recording Studios and the UK Screen Association during the parliamentary enquiry into the Crossrail project in London. Advice was given over an 18 month period and culminated in evidence being given at the enquiry hearings in both the House of Commons and the House of Lords. As a result of this action, Grand Central Recording Studios was one of the very few companies to secure an undertaking from the developers that it would be compensated should the works or operation of the railway cause disturbance to its studio operations.