OpenStreetMap Nominatim:

Sloane Square (Type: highway:primary, way 4362878, 15, 0 GOTO)

Chelsea (Type: place:suburb, node 27467067, 15, 0.0107261219184482 GOTO)

Knightsbridge (Type: place:suburb, node 27396490, 15, 0.00986636658099135 GOTO)

Royal Borough of Kensington and Chelsea (Type: boundary:administrative, relation 51793, 8, 0.0358341762249527 GOTO)

Battersea (Type: place:town, node 27554266, 15, 0.0262825232765022 GOTO)

Westminster (Type: place:city, node 27365306, 15, 0.0314844360919822 GOTO)

Clapham (Type: place:town, node 27554267, 15, 0.0355030433879831 GOTO)

Fulham (Type: place:town, node 1639959450, 15, 0.0415643539117604 GOTO)

Kensington (Type: place:town, node 27467182, 15, 0.0421704435615989 GOTO)

Camden (Type: place:town, node 399607277, 15, 0.0488522734995052 GOTO)

London (Type: boundary:administrative, relation 65606, 6, 0.048689718271682 GOTO)

Greater London (Type: boundary:administrative, relation 175342, 5, 0.0487273829958397 GOTO)

England (Type: boundary:administrative, relation 58447, 4, 1.73257657459587 GOTO)

SW1W 8AG (Type: place:postcode, 0.000579207679113302 GOTO)

United Kingdom (Type: boundary:administrative, relation 62149, 2, 4.54274559851528 GOTO)

gb (Type: place:country_code, 0 GOTO)

European Union (Type: boundary:administrative, relation 2668952, 1, 11.2040368048498 GOTO)

European Union (Type: boundary:administrative, relation 2668952, 1, 11.2040368311724 GOTO)

European Union (Type: boundary:administrative, relation 2668952, 1, 11.2040370064342 GOTO)

European Union (Type: boundary:administrative, relation 2668952, 1, 11.2040441338269 GOTO)

European Union (Type: boundary:administrative, relation 2668952, 1, 12.2642005476106 GOTO)

European Union (Type: boundary:administrative, relation 2668952, 1, 12.264200561293 GOTO)

Address