British citizen working in Brussels sends extraordinary letter to all MPs  

Henry Smith tells MailOnline it is 'breathtaking' that an EU employee should 'seek to interfere with a British democratic decision'

Tory MP for Crawley posted letter from Brussels-based worker on Twitter

EU employee lists extraordinary reasons why MPs should block Brexit vote

Remarkably, she claims referendum 'wasn't an exercise in real democracy'

Urged MP not to support triggering Brexit despite clear referendum vote

Comes amid row over whether PM or parliament has final say over leaving