Wouldn't that just affect the length of sentence though and not the verdict of guilty/non guilty of manslaughter?Its a sad case, but I think it's justified.
Legally it seems she was entitled to be on the path as it was a shared cycleway just to clear that bit up.
But someone has lost their life due to another's actions and the prison sentence is in part due to to any lack guilty plea and expression of remorse - had she pleaded guilty she almost certainly wouldn't have been sent to prison.
Whether she was the cause or not is what determines whether it was manslaughter or not. The sentencing range is then determined and she can be jailed for anywhere within that range (less for guilty pleas and showing remorse etc.).