Tony: Probably splitting hairs: Looks like you are half way there. What about trains from the other direction: I.E. top to bottom of the pix? 2 more signals are needed to protect the main line ( and turnout ); one on the main, tother on the divergent route. Both of these are on the frog side of the turnout facing outward.
Also, the Red aspect is usually used to show the next block is occupied -or- or a turnout with the points not aligned. Divergent routes are usually Yellow ( restricted ) telling engineer that the turnout is short/sharp AND as long as the block is clear. Green works if you have 'high speed points/frog'.
Signal masts can go on either side of the track. You want to place them where it is obvious to what the signal is protecting.
You need more to do .... right?
Later