Best 40-inch (42-inch) OLED TVs in the UK (September 2026)

1. LG OLED evo C6 (2026) – 42-inch

Our verdict: LG's most popular OLED gets a faster processor and 165Hz gaming in 2026, and remains the benchmark all-rounder.

Best for: The best all-round OLED for films, sport and gaming

a2z score: 9.0 Price band: Mid-to-premium

Check price at AmazonAlso at: Currys · John Lewis

The C-series is the OLED most people should buy, and the 2026 C6 keeps that crown. Every pixel lights itself, so you get perfect blacks, infinite contrast and wide viewing angles, which is ideal for dark-room film nights and fast sport alike.

New for 2026 is LG's α11 AI Gen3 processor, borrowed from the pricier G-series, for sharper upscaling of TV channels and streaming. Gamers get four HDMI 2.1 ports, refresh rates up to 165Hz, NVIDIA G-Sync and AMD FreeSync support, so it works brilliantly with a PS5, Xbox or gaming PC.

It supports Dolby Vision and Dolby Atmos, which Samsung's OLEDs don't, and runs LG's webOS smart platform with all the major UK and Irish streaming apps.

This size: The 42-inch C6 is small enough to double as a desk monitor. It skips the Brightness Booster used on bigger sizes, so it's best in rooms where you can control the light.

2. Samsung S90H OLED (2026) – 42-inch

Our verdict: Samsung's mid-range OLED gives you four HDMI 2.1 ports and 165Hz gaming in more sizes, from 42 to 83 inches.

Best for: Value OLED with strong gaming features

a2z score: 8.7 Price band: Mid-range

Check price at AmazonAlso at: Currys · John Lewis

The S90H is Samsung's value-focused OLED. It covers more sizes than the S95H, including compact 42-inch and 48-inch models, and keeps the gaming essentials: four HDMI 2.1 ports and refresh rates up to 165Hz.

Depending on size and region, it uses either a WOLED or a QD-OLED panel, so check the listing if the panel type matters to you. It isn't as bright as the S95H and lacks the matte glare-free finish, but it's often priced competitively against LG's C6.

As with all Samsung TVs, there's HDR10+ but no Dolby Vision.

3. LG OLED evo C5 (2025) – 42-inch

Our verdict: The 2025 C-series is still a superb TV, and discounts make it the value pick in the smaller sizes.

Best for: Great OLED picture at a clearance price

a2z score: 8.6 Price band: Mid-range

Check price at AmazonAlso at: Currys · John Lewis

The C5 offers most of what makes the C6 great, including self-lit OLED pixels, Dolby Vision, four HDMI 2.1 ports and G-Sync/FreeSync gaming, with a slightly older processor and a 144Hz maximum refresh rate instead of 165Hz.

Unless you're a competitive PC gamer, those differences are hard to spot. If you find a C5 noticeably cheaper than the C6, it's a smart buy, especially in the 42-inch and 48-inch sizes that work well as gaming monitors.