We (in Brighton UK) have a 1920s/30s house with a slate tile roof with no felt under the tiles, which is quite common for houses from that period.
The roof has developed a leak, and water runs down a light fitting when it rains, which is obviously not great.
We're hoping to get a loft conversion done in the next year, so are looking for a cheap temporary solution, other than just putting a big tray under it to catch the water. Is there something we can do cheaply from the inside to address this? I can access the problem area in the loft.