Imagine receiving a staggering £200,000 heating bill out of the blue – that’s exactly what happened to residents of a London flat complex, leaving them reeling and fighting back. But here’s where it gets controversial: could this be a symptom of a larger, unregulated system that’s failing consumers?
Anja Georgiou, a mother living in the River Gardens development in Greenwich, southeast London, feels trapped. ‘If I could move, I would – to a place without a heat network,’ she says. ‘But I can’t while this debt is hanging over me.’ Her plight began three years ago when residents were blindsided by a £200,000 bill for heating and hot water. Situated near the Thames and historic Greenwich Park, the development boasts amenities like a gym and swimming pool. Yet, like many modern London builds, it relies on a communal boiler system, or heat network, to supply warmth.
Heat networks, also known as district heating systems, are increasingly common, with nearly three-quarters of new London homes adopting them. These systems distribute heat from a central source via a network of pipes. However, until recently, the industry operated without regulation. That changed on 27 January when Ofgem, the energy regulator, stepped in to oversee the sector, promising to protect customers from ‘unfair price hikes.’ This move offers hope to the 500,000 to 1 million households connected to such networks.
In spring 2023, River Gardens residents were informed their energy tariff would rise that summer, from 20p per kilowatt-hour with a 55p standing charge to 37p and 39p, respectively. Worse still, their managing agent, Rendall & Rittner (R&R), revealed an additional charge due to a £198,986 debt accumulated on the heat network’s energy account over 15 months in 2022 and 2023. Calum Matheson, a software developer and leaseholder, was told he owed an extra £550. ‘It was plainly wrong,’ he says. ‘I’d already paid my bills. You can’t just send me another one.’
Residents, already up to date with payments, were baffled. R&R later explained that the development’s energy supplier, With Energy, had stopped purchasing gas in 2022, forcing R&R to take over. However, as gas prices nearly doubled, R&R failed to adjust residents’ tariffs quickly enough, creating a deficit. This ‘regrettable delay,’ as R&R termed it, resulted in bills ranging from £50 to £600, with Georgiou’s share at £337. R&R warned residents they couldn’t switch to a cheaper winter 2023 deal until the debt was cleared.
The reaction was furious. ‘Our energy contracts had clear terms,’ Georgiou insists. ‘They can’t just demand higher tariffs for bills already paid. It’s outrageous.’ Matheson fought back, contacting the Energy Ombudsman and, later, applying to a first-tier property tribunal. Representing himself and 56 other leaseholders, he argued there was no legal basis for charging historical tariff increases, citing consumer protection laws and the terms of their energy bills, which placed the risk of gas market volatility on With Energy.
Last month, the tribunal ruled in their favor, declaring the debt ‘irrecoverable as service charges.’ It also disallowed 20% of R&R’s fees for the period in question. Despite the victory, many residents, including Matheson, had already paid under threat of legal action. The tribunal lacks the power to order refunds, and the debt remains on Georgiou’s account.
R&R, while acknowledging the ruling, maintains the charges are legally payable to their client, not to them. Matheson hopes R&R will rectify the situation but remains principled: ‘I want my £550 back.’
And this is the part most people miss: heat network customers, unlike traditional energy users, aren’t protected by Ofgem’s price cap. During the energy crisis sparked by Russia’s invasion of Ukraine, some saw costs surge by up to 450%. Yet, heat networks are central to the UK’s net-zero ambitions, with the government aiming for them to supply a fifth of England’s heat by 2050, up from 3% today.
Ofgem’s new oversight promises clearer bills, fair pricing, and reliable supply. Helena Charlton, Ofgem’s director of heat networks, admits, ‘Too many people face unclear bills and poor communication.’ New protections, including ombudsman services, took effect in 2025, but critics argue they lack robust price safeguards.
Stephen Knight of Heat Trust calls the regulation ‘long overdue,’ highlighting the absence of clear rules for treating heat network customers. ‘The new rules are a step forward, but proper price protection is still missing,’ he says.
Is this enough to prevent future shocks like River Gardens’? Or will consumers remain vulnerable to unfair practices? Share your thoughts in the comments – this debate is far from over.
