Not fully understanding the comment saying that fast track at T1 is not available for status members...I assume you mean T1 at LHR?
Yes it is at T1...
Fast Track
Fast Track Boarding is available for:
• all customers travelling in Club World and Club Europe
• customers with a fully flexible UK Domestic ticket (Business UK)
• BA Executive Club Gold and Silver members
• oneworld Emerald and Sapphire members