Can I pipe basin waste into toilet flush pipe?

Can I pipe basin waste into toilet flush pipe?

Can I pipe basin waste into toilet flush pipe?

I have an outside loo with a small basin. Currently, the basin waste simply runs out through the wall and along the fence to pour on to the lawn. Not ideal.
I could of course add a proper soak-away but I was thinking, can I instead simply pipe the waste into the flush pipe of the toilet? I don't see why not?
If so, what connection should I be looking for?
Thanks

by RrogerD

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