In case you were wondering, a story like this with exclusive pictures runs anywhere between £8k and £12k, depending on the publication.
We had The Sun on the phone once when a student from our school found some human remains (later turned out to be years and years old and were legally buried there) when he was planting in the vegetable garden. They offered us £5000 to let them do the photos on site. We politely said no.
His mum later told us that the Daily Mirror had paid £5000 for the story and would've paid more with the photos. She put the money into a savings account for her DS and the Daily Mirror paid for a lovely plaque to commemorate the man whose remains were found. It all turned out alright in the end.
This to me seems like she decided she didn't like being a teacher and wanted a reason to get sacked.