Newel post

[williamglossop]

The previous home owner has butchered the newel post at the top of my stairs. See attached pics. I would like to replace it with a square section straight newel post. Any suggestions on how to achieve this, given the way it's been cut previously.....

Many thanks.

Bill

 

[Tigercubrider]

It's not really clear to me what you want to do but you could clad the whole white newel with ply or mdf carefully cut to box in the original. If you can do 45° edges you will get a nice corner with minimal filling. Lots of dry fitting to ensure that it all lines up.
You could take up changes in level by the likes of 3mm mdf glued in place to get a good vertical line and use something like gripfill to secure most of it and take up gaps