Why is the TORA of 27R not the same as the TORA of 09L?
These seem to be the numbers of Heathrow / EGLL. When you look at the taxi diagram, you see that on 09L you have a taxiway that places you right at the beginning of the runway whereas on 27R when taxiing on A1 you end up juuust behind the start of the runway – probably 18m behind it.