I found this mate in two   1 Re2  (any move with your rook there the rook ends up on the e-file except for e6, e7 and e8 is possible)  Kg8 (only possible move)   2 Re8#

Sorry, thats incorrect because black can move Kf7.

Oh, right I missed that one...    But then I can only see this  1  Bd4  Kf8   2 Kg6   Kg8   3 Re8#    But if King moves  1 ... Kg8 then it's a mate in 4, 2 Kg6   Kf8   3 Bc5  3 Kg8  4 Re8# 

Thats true. But if 1. Bh8 Kg8 2. Rf1 Kxg8 3. Rf8#.

So the correct move is 1. Bh8

Yeah, I see it if it's Kxh8 and not Kxg8.