leaking roof

[Samuel coe]

Hello,

I recently purchased an end of terrace Edwardian property. The roof is generally in good condition however upon looking in the the loft, found a few tears in the felt. These are only small so think I can patch them up.

However, there is one which I am not sure how to sort and it is causing water to leak down the wall of the bedroom below along the edge of the chimney breast. I am pretty sure it is not the chimney causing the water but any ideas of how to repair. It’s a bit tricky as it is where the joist join together.

See attached pictures and thanks for any tips in advance.