Browse all EPC certificates at a postcode — use when you have no house number.
Returns a slim list of every certificate at the postcode. Each entry contains:
address, rating, score, floor_area (sqm), property_type, floor_level,
habitable_rooms, inspection_date, lmk_key.
Workflow for Rightmove listings where the house number is not shown:
1. Call rightmove_listing to obtain floor_area_sqm, property_type, and
any floor-level signals in the description (e.g. "top floor", "ground floor").
2. Call property_epc_search(postcode) to retrieve the full cert list.
3. You MUST cross-reference each cert's floor_area against the listing's
floor_area_sqm (accept within ±5 sqm) AND property_type must match.
Also use floor_level and habitable_rooms where available.
4. If a single cert matches, call epc_certificate(lmk_key) for the full detail.
5. If multiple certs match equally, present all candidates — do not guess.
If floor_area is unavailable on the listing, filter by property_type only
and return all candidates.
Returns None if no certificates exist for the postcode.
Connector