Nope.

"In the end, the 2022 contest saw Reading beaten to the post by Dunfermline, Bangor, Douglas, Doncaster, Wrexham, Colchester, and nearby Milton Keynes. "

https://www.readingchronicle.co.uk/news/25782760.reading-not...

A lot of sources seem to cite Reading as 'England's largest town' but maybe that is by area, rather than population? Also depends on where you put the boundary.