On another thread I asked the question and the answer was that Clearway is limited to 50% of TORA. It can't go on forever. I must admit watching some a/c seem to struggle their way over the fence. BAC1-11 was one. I wonder what would have happened on only 50% of thrust. I've even watched some 4-pots freighters seem to climb very flat & slowly and wondered what would have happened on 75% of thrust. Faith. In this BRS case I'd have been more concerned about the 'stopping' case, if it had been necessary. It has been said that TORA = ASDA. It seems it would have been very tight.
Still waiting for some B738 pilots to post their i-pad numbers for BRS RW27.