£419,151
The fine seems out of step with her wages.
https://www.yorkshirepost.co.uk/news/bbc-attacked-over-150-000-a-year-christa-ackroyd-absence-from-look-north-1-5608665 states that she was earning ~£150,000 per year over 7 tax years.
That would be £1,050,000 in salary and assuming she'd paid tax and NI/employers NI at some point - £419,151 (39.92% of salary) seems quite a lot in my opinion.
I'm sure it's right since it went to court but does seem a lot.