Timing helps separate the questions
A stain that changes after a bath and one that changes during rain suggest different starting points. Neither pattern proves the source on its own, but describing it helps the engineer decide what is worth testing.
Consider the spaces above and beside it
Pipe routes and joists can carry water away from where it escaped. A neighbouring room, another flat or concealed services may be involved. Arranging access to the relevant space can be essential.
Match the specialist to the findings
The Exact Source package concerns agreed plumbing investigation and repair. Roofing and building waterproofing need separate instruction. A bulging ceiling or water close to electrics requires urgent safety attention rather than waiting for a routine enquiry response.
Related service
Ceiling leak detection explains the practical investigation and the scope to discuss before booking.
For agreed residential work, the Exact Source package is £1,400, including applicable tax. Necessary access, plumbing repair, materials, suitable checks and a Trace & Access report are included. Decorative and remedial reinstatement is excluded.