"Let me get this straight,” I said to the mortgage broker. “In order to borrow less, I have to earn more?” That was, she confirmed, the gist of what she was saying. She was apologetic but the bottom line was immovable.

The lenders, those invisible men and women in grey suits in a boardroom somewhere, will not readily agree to give me another mortgage if I move. This is because a lot has changed since the last time I applied, which was a long time ago, back in the days when mortgages were easy to get.