Originally Posted by
CAP493
Absolutely 100% correct!
And if you do, at any airport having NATS as the ATS Provider, it's rated as a 'Runway Incursion' and could invoke the filing of an MOR.
Even if ATC's given you a 'conditional clearance', if the reds are still red when you need to enter the runway, hold position and query the clearance.
And in any case, a conditional clearance regarding lineup or RWY crossings is in my world a dangerous thing. Combine a conditional clearance with a red stopbar and a slight misunderstanding (it doesn't take much to create confusion in the cockpit) and voila: Linate all over again!
/LnS