Split stair tread

[Landycat]

I'm looking for advice on how best to repair the split on my pine staircase?

It's about an inch from the front edge and goes almost all the way across,but is still attached at each end,if I put my foot on it it opens up the split and looks like it might be ready to let go.

Any repair ideally needs to look good because this is a varnished staircase and I don't want a carpet.

 

[bobasd]

you could drill pilot holes through the nosing of the tread, and drive in say sf 17409 screws of a suitable length.
sink the heads if theres enough meat, and apply plugs to suit.

nosings project 25mm on average although 40mm is allowed. 40mm is vulnerable to splitting.

 

[foxhole]

Glue and pin it .

 

[Landycat]

you could drill pilot holes through the nosing of the tread, and drive in say sf 17409 screws of a suitable length.
sink the heads if theres enough meat, and apply plugs to suit.

nosings project 25mm on average although 40mm is allowed. 40mm is vulnerable to splitting.

It sticks out about 25mm,I'll glue and screw it then.Should I use PVA wood glue (because I have some) or is there a better option?