In case anyone else is as totally bemused by bobad's post as I am, I think what he is referring to is this (from Wikipedia):

"In March 1921, the Colonial Secretary Winston Churchill visited Jerusalem and following a discussion with Emir Abdullah, it was agreed that the Jewish National Home objective for the proposed Palestinian Mandate territory would not apply to the Mandate territory east of the Jordan River. In accordance with that agreement, the Churchill White Paper of June 3, 1922, stated explicitly that "the terms of the [Balfour] Declaration referred to do not contemplate that Palestine as a whole should be converted into a Jewish National Home, but that such a Home should be founded 'in Palestine'."

It was never intended that Transjordan should be part of Israel, not even by the British.