Describe the enclosure
Give approximate opening size and whether the panel is removable through its normal fitting. A photograph from the room can show fixed furniture and the connected fixtures.
Keep the fault account separate
State the symptom and model if known. Suitable work may depend on gaining appropriate access; do not break tiles or remove fixed sanitaryware merely to obtain a label photograph.
A useful distinction
If the model label cannot be reached through the normal opening, existing paperwork may help. An engineer can confirm what further access is needed; damaging the enclosure before scope is agreed is unnecessary.