Property B - Photo AI Grid

Please process the attached photo grid. The grid contains images of a property, each labeled with an ID (e.g., ID: 1).

Here is the context about the property to help you accurately describe the photos:
- Current Title: 3 bedroom flat for sale in Castelnau, Barnes, London, SW13
- Current Description: A character Victorian mansion block apartment, built in 1900 located close to the Hammersmith Bridge and Hammersmith Station, with great views. The property boasts a large central entrance hall, leading to a bright and spacious living room, three double bedrooms, a family bathroom with separate bath and shower, and a modern fully fitted kitchen/dining room, with access down to the well maintained communal gardens. This character property has retained many original features such as high ceilings, feature fireplaces, large 'Everest' secondary glazed sash windows, and a re-insulated roof. This top floor apartment has a porter service and spectacular views into the city and towards the River Thames. Castelnau Mansions is conveniently placed for the amenities of Barnes and Hammersmith. For the commuter Hammersmith's underground and overground network is also a short walk over the bridge. The schools in the area include The St Paul's School, The Harrodian, The Swedish School, Ibstock Place School, St Osmunds' (RC) and Barnes Primary School. The property is available for sale with no onward chain.
- Bedrooms: 3
- Bathrooms: 1
- Build size: N/A
- Price: £950,000

I'd like to extract insights for both the individual photos and the property as a whole. Return ONLY a JSON object that strictly follows this structure without markdown blocks:
{
  "property_insights": {
    "title": "A new suggested, punchy, engaging marketing title based on your analysis of all the photos.",
    "description": "A refined marketing description highlighting the mood, aesthetic, and key features shown across the photos.",
    "target_audience": "Who you think this property is perfect for (e.g. 'Growing families', 'Investors', 'Retirees')",
    "architectural_style": "The architectural style of the property based on visual hints (e.g. 'Modern Mediterranean', 'Contemporary', 'Andalusian')"
  },
  "photos": {
    "0": {
      "description": "Detailed description of the photo, the room, objects, lighting, and context.",
      "tags": ["tag1", "tag2", "tag3"]
    }
  }
}