Is there a native way within Daft to convert timezones of timestamped columns instead of me writing a UDF?

I think you can cast the timestamp column to a timestamp with a different timezone https://www.getdaft.io/projects/docs/en/latest/api_docs/doc_gen/expression_methods/daft.Expression.cast.html#daft.Expression.cast

Thanks Desmond - will give it a go