Matter 1.5: What's New for UK Smart Home Users

The headline additions, in roughly the order most UK buyers will care about them:

Cameras have been the biggest hole in Matter since 1.0. Until 1.5 the standard was strong on lights, plugs, thermostats and sensors but had no cross-vendor way for a Nest Doorbell to ring an Alexa speaker, or a Ring camera to surface a still in Apple Home. Every camera ecosystem ran on its own proprietary stack.

The Matter 1.5 camera spec uses WebRTC (the same standard that runs Google Meet and FaceTime under the hood) for the actual video stream, with STUN and TURN servers for NAT traversal when the camera and viewer aren't on the same network. The control plane sits on standard Matter clusters, but the video itself runs over WebRTC. Two-way audio is supported - so doorbells work properly. Multi-stream means a low-bitrate preview can render in the home dashboard while the full-quality stream goes to recording.

What it does NOT do (and why you should not expect every camera to switch overnight):

• Cloud-based AI features stay proprietary. Person/package/animal detection, familiar-face recognition, and event timelines remain ecosystem-specific. Matter 1.5 covers the stream and the basic event types only.
• Existing cameras need firmware updates. Most won't get them. Matter is a 'designed-in' standard - retrofitting it to legacy cameras with limited compute is non-trivial. Expect new 2026 hardware to ship with Matter; expect 2023-2024 cameras to stay on their proprietary stack.
• Ecosystem rollout is staggered. SmartThings and Home Assistant typically support new Matter device types fastest; Apple Home and Google Home tend to follow once their internal frameworks catch up. As of mid-2026, Home Assistant has confirmed it's working on two-way audio support for doorbells before turning on camera display.

The UK has the most price-signal-rich domestic energy market in Europe. Time-of-use tariffs from Octopus (Agile, Cosy, Go), E.ON Next Drive, Ovo Charge Anytime, and others mean a smart load that reacts to the half-hour price can save real money - typically £150-400 a year on a household with an EV or heat pump plus a battery.

Until Matter 1.5, the price signal was locked inside each ecosystem. Octopus's Agile API talked to specific integrations; Home Assistant users hacked together custom price-fetching automations; Google Home and Apple Home had no native concept of time-of-use pricing at all.

The new Electrical Energy Tariff device type changes that. A single source (your supplier's gateway, a smart meter IHD, or a Home Assistant integration) can publish the day-ahead and current price to every Matter device on the network. Your EV charger, hot water diverter, battery and washing machine can all react to the same data without a separate integration per appliance.

For EV V2G/V2H, the spec coming through the standard is a quiet milestone. The UK government has been funding V2G trials since 2017, but commercial roll-out has been slow because every car manufacturer had its own proprietary discharge stack. Matter 1.5 standardises the cluster definitions - state-of-charge, discharge rate, mode (charging / discharging / idle) - so a single Matter-compliant charger can work with multiple V2G-capable vehicles.

The honest answer is: mostly not at all. Matter is a software standard. A device built and certified for Matter 1.4 still works exactly as it did - the new features in 1.5 are additive, not breaking changes.

What you might notice:

• Your existing hub may pick up new clusters via firmware. If your hub vendor (Apple Home, Google Home, SmartThings) ships a Matter 1.5 controller update, your new 1.5 devices will work without a hardware swap. The most active updaters are SmartThings and Home Assistant; Apple and Google tend to fold spec updates into their annual OS releases.
• Your existing cameras almost certainly won't get Matter. Ring, Nest, Eufy, Reolink and the others have committed to no broad Matter 1.5 firmware retrofits. Buy 2026+ hardware if you specifically want Matter cameras.
• Your existing smart plugs/lights stay on their current spec. No reason to upgrade them.

The Thread vs Wi-Fi decision and your network quality still matter as much as they did before 1.5. None of the new device types change the fundamental transport story.

The temptation when a new spec lands is to wait for 1.5 versions of everything. Don't. Most of your smart home decisions are unchanged. The areas where 1.5 actively changes the buying picture:

This is the question nobody can fully answer until the OS releases land, but the rough pattern from 1.3 and 1.4 was:

• SmartThings typically supports new device types within 2-4 months of spec release. Expect partial 1.5 support (cameras, closures) live by late summer 2026.
• Home Assistant follows its own cadence - device support is community-contributed via the python-matter-server library. The Home Assistant 2026.6 release already laid groundwork; full camera support is being staged across 2026.7-2026.10.
• Apple Home tends to fold spec updates into its annual iOS / iPadOS / tvOS / HomePod autumn releases. Realistic earliest broad camera support: iOS 19 (autumn 2026) or iOS 20 (autumn 2027). Don't expect day-one parity.
• Google Home updates run in parallel with Android quarterly releases. Camera support has been on its public roadmap; closures and energy will be later.
• Amazon Alexa has been the slowest to support new Matter device types historically. Don't bet your purchases on Alexa being early.

For an honest expectation: if you want all four major ecosystems supporting Matter 1.5 cameras end-to-end with familiar UX, you're looking at spring-to-autumn 2027. The next year will be early-adopter territory.

Matter 1.5 is the release where the standard finally covers most of the smart-home hardware UK buyers actually own. Cameras and doorbells are the headline; the electricity tariff and V2G EV charging additions are the bits that will quietly save UK households more money over the next two years.

The practical advice for 2026: don't replace working kit. Wait on new camera, doorbell and garage-door purchases if you can stretch 6-12 months and you have a mixed-ecosystem household. Buy time-of-use-aware EV chargers and batteries assuming Matter compatibility will land via firmware in 2027, not insisting on it at point of purchase today. Carry on with smart plugs, lights and thermostats as before - 1.5 doesn't change the picture there.

The bigger picture: 1.5 plus 1.4 plus the Thread Border Router fixes mean that, for the first time, building a Matter-first smart home from scratch in 2026 is genuinely the sensible default for UK buyers - not the early-adopter gamble it was in 2023.