Tell us which part of the building changed and whether the gutter concern began before or afterwards. Include a new porch, extension or moved downpipe in wider photographs. Earlier images can help explain the difference, but there is no need to produce a complete plan. Name what you know and leave uncertain connections as questions.
Supply the Hounslow postcode and describe the route to the affected side. If contractors are still working there, mention their access arrangements. Photographs should be taken safely from the ground rather than from scaffolding or a roof.