FOI003750 EIR Sustainability, Energy and Climate

Under the Freedom of Information Act 2000, please provide the following information held by Royal Borough of Windsor and Maidenhead:
1.    The names of the companies on any approved, preferred or framework list the council uses for domestic energy work, including heating, heat pumps, insulation, solar PV, windows and EV chargers. This includes installers used to deliver grant-funded home-energy schemes.
2.    For each company, the trades or measures it is approved for.
3.    If the council uses a managing agent or an external framework instead of its own list, the name of that agent or framework.
Company names are all I need. Please don't include individuals' names or personal contact details.
If this information is already published, a link is enough. Otherwise I'd be grateful for it as a spreadsheet (Excel or CSV).