Parliamentary Voting System and Constituencies Bill

It appears that my hon. Friend will not address the following question: if my amendment does not achieve the purpose of introducing, for the sake of consistency, the London AV system, would he be in favour of an amendment that did achieve that being brought forward on Report? If not, can he answer this question: why does he believe we should have more than one AV system operating in this country—the London AV system plus the AV system he is introducing through the Bill?