Oh dear, backtracking now, which is exactly what you criticise others for doing. Mind you, I do see where you might have misunderstood.
Grammar schools are always going to do better in league tables because they don't have the full range of abilities - that was my point. The grammar teacher I was with made the comment about not having many SEND/EAL students and therefore not needing training on inclusivity. To an extent, not having students with ADHD or who barely speak English will indeed keep results high.
However, your response was
"What is the difference between educating EAL and SEND students separately in a set and educating them separately in another building?"
I don't assume that they automatically do worse. You seem to think they should be kept separate, either through setting or in a separate building.
You followed up with "As you were talking about setting earlier I assumed you approved of setting. Perhaps you are about to change your mind? If you are in favour of setting you must be in favour of setting along the lines of intellectual ability? Perhaps not? If you are setting would you set in the same room? Or in different rooms? So the difference between separate rooms and separate buildings would be ..?" so it is you who thinks that SEND = unintelligent. I am going to assume that you don't actually think that, but you can see where I got that impression 