Visiting Lincoln - Question about park and ride

Hi,
we are visiting Lincoln tomorrow (Saturday 03/04) And have a question about the park and ride near Waitrose.

Will we find a parking spot and how long can we park there while we visit the city centre?
I keep reading that the Waitrose car park has a 4 hour limit, but not sure if that applies to park and ride also.

Thank you for any answers, and looking forward to visiting your lovely city!