I'm pretty sure that a lot more Brits presently have a television than air conditioning.

searches

https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/families/bulletins/familiesandhouseholds/2025

In 2025, there were 29.0 million households in the UK

https://en.wikipedia.org/wiki/Television_licensing_in_the_United_Kingdom

In March 2024, there were 23.9 million licences, of which 3,600 (0.015%) were monochrome (black and white).

So about 82% of households have a TV.

https://www.theguardian.com/environment/2026/may/28/air-conditioning-uk-homes-heatwave

An estimated 4m homes have an air conditioner, double the figure from three years ago.

And about 14% have air conditioning.

EDIT: Also, the TV number might be higher, given that I imagine that there's some portion of the population that owns a television and just isn't paying the licensing fee. This would just be a floor on the number.