Harrow actively encourages registration at other schools because it is so oversubscribed.
Do you know how heavily oversubscribed Harrow is? I would have thought Eton would be more oversubscribed but perhaps its self selective academically while Harrow is looking for something more than acadenics. Do you really need to register your child at birth for Radley?
We didnt get asked on the form if we had considered other school nor did they ask her which other school she had applied to during the interview but as with all things indie its all very diff. I dont see how colluding would work in any of the school's favour unless all the schools one applies to are part of the pact which doesnt seem the case considering some children get offers from nearly all the schools they go for. I am sure the ones nosey enough ask you to fill that on the forms or ask the child at the interview but getting the truth is another matter.