In t5 ba has a dedicated check in area for first and owe
It has its own security which leads directly into the first lounge which is open to owe. Only people first or ccr lounge access can use that security.
There are also 2 regular fast track areas for business/ows, one each at north and south security.
as ows i prefer the one at north security, it is usually quieter as it is well away from business check in and is a short walk from the north lounge