Happy valley is a BBC series about a Yorkshire tough policewoman with a disfunctionel family and guess what she is raising her grandson. Mare of East town is about a tough policewoman with a disfunctional family and guess what she is raising her grandson .that said both Sarah Lancashire (happy valley).and Kate Winslet are superb.as you are more likely to have seen mare of easttown .I recommend you seek out happy valley.though Kate is wonderful , it would be nice to see Sarah Lancashire getting the same acclaim..so both are great but as happy valley started earlier .their is definitely some plagerisim going on.