The images from Havana are stark: a city plunged into darkness, its 2 million residents dependent on a creaking Soviet-era grid that collapses without warning. For Britain's high-rise residents, accustomed to the flick of a switch, the parallel is uncomfortable but instructive. The energy debate in the UK, long focused on the cost per kilowatt-hour, must now confront a more fundamental question: resilience.
Cuba's energy crisis is a story of deferred maintenance, geopolitical isolation, and climate vulnerability. Its power plants, many over 40 years old, run on subsidised Russian oil whose supply has grown erratic. Hurricanes strike with increasing ferocity, damaging transmission lines. The result is a system where blackouts are not exceptions but expectations. For Britain's tower block dwellers, a similar fragility lurks below the surface. The UK's electricity network is modern by comparison, but its vulnerabilities are structural. Gas-fired plants provide 40% of our power, and that gas comes from global markets subject to price shocks and supply disruptions. The February 2023 blackout in London's Canary Wharf, which stranded commuters in lifts, was a harbinger. It demonstrated what happens when demand spike meets supply fall short.
Our ageing infrastructure is another weak link. The National Grid estimates that 30% of its cables are over 50 years old. Underground cables corrode; overhead lines sag in heatwaves. For a flat on the 20th floor, a failure in the local substation means no lift, no water pump, no lights. The vulnerable elderly, the disabled, the families with infants: they bear the brunt. The 2022 heatwave exposed this: in Glasgow, 1,000 properties lost power when a transformer overheated. In London, the Tube shut down. The climate is amplifying these risks. Extreme weather events, once rare, are now annual occurrences. The UK's grid, designed for a milder past, is not resilient to a world of 40°C days and violent storms.
The economic cost is mounting. The British Energy Security Strategy, published in April 2022, committed to a renewables roll-out, but the pace is glacial. Offshore wind capacity has doubled since 2010, but it still accounts for only 20% of generation. Nuclear, which provides 15%, is hobbled by delays at Hinkley Point C. The net effect: we remain tethered to volatile gas markets. In 2021, a spike in Asian demand sent UK wholesale prices up 250%. Households faced a 54% increase in the price cap. For high-rise residents, many of whom rely on electric heating, the impact is existential. Fuel poverty rates in flats are double those in houses, a consequence of poor insulation and inefficient storage heaters.
Technological solutions exist. Microgrids powered by rooftop solar and battery storage can decouple buildings from the national network. In Homerton, London, a community energy scheme uses solar panels on flat roofs to power shared lifts and lighting. The scheme cut bills by 30% and eliminated blackout risk. At a larger scale, the UK's first large-scale battery storage facility, in Yorkshire, can power 300,000 homes for an hour. But these are pilot projects, not policy. The government's Heat and Buildings Strategy allocates £450 million for heat pumps, a fraction of the £50 billion spent on Covid furloughs. The imbalance is stark.
The lesson from Cuba is not that the UK will become an energy basket case. It is that neglect has consequences. The Cuban grid is a cautionary tale of what happens when maintenance is postponed, investment starved, and dependencies ignored. Britain's high-rise residents, living in vertical communities, are the canaries in the coal mine. Their dependence on a brittle grid, their vulnerability to price spikes, and their exposure to climate shocks mirror the national picture. The question is whether the UK will treat energy fragility as a crisis or as a chronic condition to be managed. The answer will determine whether our children inherit a grid that can weather the storms to come or one that crumbles under the weight of neglect.
The data is clear: the planet is warming. The seas are rising. The extreme is becoming the normal. Britain must adapt not just its homes but its energy architecture. For the residents of tower blocks, the time for debate is over. The future demands action, measured, urgent, and precise.
