Don’t go into reasons or whatever, just the fact you’re going.
This… MrsSheeps has just toned down my resignation letter (that my boss will be getting this morning) removing all the emotion, and reasons why I’m going and what management changes precipitated the move.
Just simply, I resign, I have 3 months notice, this identifies the start of it*
*I am soooooo hoping for gardening leave but equally sooooo unlikely!!