In the UK, under certain circumstances, "falsification of documents" is a breach of the Air Navgation Order and consequently a breach of the law.
I don't know how NATS would handle it, but I know of a few non NATS ATCOs who've been involved in this kind of thing and, with the exception of one (who was dismissed) they were given pay in lieu of contractual notice with the promise of a basic employers reference and told to leave immediately.
None appealed.
These guys in Germany screwed but it doesn't mean they'll never work as ATCOs again.
After, we used to send our criminals to Oz and it didn't do them any harm....
