Photograph the approach to each requested side.
Show the ground beneath the gutters, lower roofs, glass additions and overhead cables. Explain gates, entry through the home and any shared or neighbouring route. Access at the front cannot establish that a rear run is reachable, and a window view is not a working position.
Gutter vacuum cleaning is available where suitable, without a promise of unlimited reach. The HSE introduction to work-at-height risks explains why the task and surroundings need checking. Do not climb or alter structures to prepare a rear view.