Mortgage only 3.22 x income to loan ratio?

This article states: "Savills’ analysis was based on what could happen if the changes increased the average loan-to-income ratio among first-time buyers from 3.22 to 3.47."

Isn't that super low, I thought average mortgage was 4 to 4.5 x income, even for a ftb.

Am I misunderstanding something?

https://www.telegraph.co.uk/business/2025/01/26/reeves-mortgage-overhaul-to-drive-up-first-time-buyer-house/