| 121 West Hill Management Company Limited | Harlow | 2013 |
| 121 Westcombe Hill Limited | Dartford | 2020 |
| 121 Wilberforce RD Management Ltd | London | 2015 |
| 121-123 Alderney Street London Limited | London | 2007 |
| 121-123 Charterhouse Property Management Company Limited | London | 2000 |
| 121-123 Thorpe Road Limited | Norwich | 2006 |
| 121-127 Saunders Ness Road RTM Company Limited | London | 2022 |
| 121-131 Battalion Way RTM Company Ltd | Thatcham | 2024 |
| 121-143 Hurworth Avenue Share of Freehold Company Limited | Eastbourne | 2005 |
| 121/128 Beaufort Mansions Management Limited | London | 1982 |
| 121/131 Brownlow Road Management Limited | London | 1978 |
| 1214 Blomfield Limited | London | 2021 |
| 1214-1216 Christchurch Road Management Limited | Christchurch | 1986 |
| 121RAILWAYSTREET Management Company Ltd | Cardiff | 2021 |
| 122 & 122A Pembroke Road Ltd | Cardiff | 2019 |
| 122 Beaufort Street Limited | London | 1998 |
| 122 Burnt ASH Hill RTM Company Ltd | London | 2021 |
| 122 Ferme Park Road Limited | Holmfirth | 2006 |
| 122 Gloucester Avenue Limited | London | 2008 |
| 122 Hampton Road Redland Management Company Limited | Ilford | 2007 |
| 122 Hewitt Road Freehold Limited | London | 2005 |
| 122 High Street Ltd | Lee-On-The-Solent | 2018 |
| 122 KEW Road Limited | Richmond | 1971 |
| 122 Knollys Road Management Limited | London | 2015 |
| 122 Leighton Road Limited | London | 2004 |
| 122 Lennard Road Management Company Ltd | Beckenham | 2002 |
| 122 Lower Road Limited | Marden | 2015 |
| 122 Lyndhurst Way Limited | London | 2022 |
| 122 Marlborough Road Ltd | Wokingham | 2003 |
| 122 Melrose Avenue Freehold Limited | London | 2026 |
| 122 Mildmay Ltd | Rustington | 2023 |
| 122 North Hill Management Limited | Plymouth | 2013 |
| 122 Palmerston Road Management Company Limited | Potters Bar | 1997 |
| 122 Pembroke Road Management Company Limited | Bristol | 1995 |
| 122 Queens Road Bury ST. Edmunds Management Company Limited | Suffolk | 1973 |
| 122 Queenstown Road Limited | | 2006 |
| 122 Saint Julian's Farm Road Residents Company Limited | London | 2003 |
| 122 Shirland Road Freehold Company Limited | London | 2025 |
| 122 Shirley Street Hove Limited | Hove | 2016 |
| 122 Sinclair Road Management Limited | London | 2001 |
| 122 Stockwell Road Freehold Limited | London | 2013 |
| 122, Greencroft Gardens Limited | | 1981 |
| 122-124 Blackstock Road Limited | Maldon | 2015 |
| 122-126 Lewisham Way (Freehold) Limited | Bromley | 2019 |
| 122-126 Lewisham Way RTM Ltd. | Bromley | 2016 |
| 122/124 Nether Street N12 Management Limited | Edgware | 1988 |
| 123 -125 Charlton Road Freehold Company Ltd | London | 2016 |
| 123 55 Ellesmere Road Limited | London | 2026 |
| 123 Brecknock Road Freehold Management Company Limited | London | 2024 |
| 123 Brondesbury Road Limited | London | 2019 |
| 123 Camden Street Limited | | 1999 |
| 123 Chapel Lane (Cove) M. C. Limited | Farnborough | 2005 |
| 123 Court Hill Road Lewisham Limited | London | 2004 |
| 123 Fordwych Road Limited | | 1986 |
| 123 Garden Ltd | Berkhamsted | 2021 |
| 123 Graham Road Limited | London | 2006 |
| 123 Hursley Road Management Limited | Southampton | 2011 |
| 123 Ifield Road SW10 Limited | London | 2013 |
| 123 King Henry's Road Ltd | London | 1998 |
| 123 Ladbroke Grove Management Limited | Norwich | 1997 |
| 123 Leander Road Limited | London | 2016 |
| 123 London RD Ltd | St. Leonards-On-Sea | 2017 |
| 123 Marine Parade Limited | Brighton | 2002 |
| 123 NKR Investments Limited | Burgh Heath | 1999 |
| 123 North Street Management Limited | Bristol | 2018 |
| 123 Packington Street Limited | Camden Town | 2005 |
| 123 Property People Ltd | Middlewich | 2025 |
| 123 Randolph AVE (Freehold) Ltd | London | 2018 |
| 123 School Green Road Freshwater (IOW) Limited | Newport | 2004 |
| 123 Shakspeare Walk Management Company Limited | London | 2017 |
| 123 Shenley Road Limited | London | 2025 |
| 123 Sinclair Road Limited | London | 2018 |
| 123 Southgate Road Limited | London | 1995 |
| 123 Southgate Street Limited | Newbury | 2009 |
| 123 ST George's Court Management Company Ltd | Shrewsbury | 2022 |
| 123 ST Georges Drive Management Company Limited | London | 1999 |
| 123 Sutherland Avenue Limited | London | 2011 |
| 123 the Mount Management Company Limited | Belfast | 2023 |
| 123 Victoria Way Residents Limited | London | 2001 |
| 123 WBR Limited | London | 2022 |
| 123 Wolverton Mansions Limited | Ruislip | 2015 |
| 123 York Road RTM Company Limited | Wadhurst | 2022 |
| 123, Canfield Gardens Limited | London | 1976 |
| 123-125 Eastcote Lane Ltd | Northolt | 2025 |
| 123-125 Grange Road West Management Company Limited | Sutton | 2024 |
| 123-125 Harley Street RTM Company Limited | London | 2023 |
| 123AQG Limited | Isleworth | 2019 |
| 124 & 126 Perry Rise (Forest Hill) Management Ltd. | London | 1989 |
| 124 Alderney Street Freehold Limited | Knutsford | 2010 |
| 124 and 126 Tachbrook Street London SW1 Limited | London | 2003 |
| 124 Anerley Road RTM Company Limited | London | 2005 |
| 124 Barons Court Road Management Limited | London | 2013 |
| 124 Brondesbury Villas Limited | London | 2020 |
| 124 Clive Road Limited | London | 2025 |
| 124 Coldharbour Road Ltd | Bristol | 2024 |
| 124 Croydon Road Penge Management Company Limited | | 2006 |
| 124 Devonshire Road (Chiswick) Freehold Limited | London | 2008 |
| 124 Eastern Esplanade RTM Company Limited | Southend-On-Sea | 2025 |
| 124 Edith Road Residents Association Limited | London | 1997 |
| 124 Eglinton Road RTM Company Limited | Bexleyheath | 2011 |