No. The time difference between the UK and Tenerife is the least problematic thing in your life. It’s like worrying about the correct way to fold a fitted sheet. It doesn’t matter. You go to Tenerife to forget time exists anyway. The sun sets at 9 PM in summer, and you’re three sangrias in. You won’t know if it’s Tuesday or Thursday. You won’t care.
Here’s a weird historical fact to impress your friends: Tenerife’s time zone, WET, is the same as Portugal, Ireland, and — get this — Morocco. Yes, Morocco. So if you ever get lost in a Moroccan souk and need to know what time it is in Tenerife, the answer is: exactly the same time. Unless Morocco is also doing their own weird Ramadan clock changes, but that’s a headache for another article.
Final punchline: the time difference is one hour. That’s the amount of time you’ll spend looking for your hotel room key in the sand. Don’t overthink it. Book the flight, turn your watch ahead (or back, depending on the season), and enjoy the fact that you are now living in a world where the biggest problem is deciding which beach bar has the best mojito. Cue the sunshine emoji.