Here is the article and then the list below for those who don't want to access the link:
https://www.bbc.co.uk/mediacentre/2022/the-one-show-viewers-most-loved-bbc-tv-programme1. Only Fools and Horses
2. Doctor Who
3. Strictly Come Dancing
4. Line of Duty
5. Call The Midwife
6. Gavin and Stacey
7. Fawlty Towers
8. Blackadder
9. Morecambe and Wise Show
10. The Vicar of Dibley
11. Dad's Army
12. Planet Earth I and II
13. Killing Eve
14. Dinnerladies
15. Yes Minister / Yes Prime Minister
16. Sherlock
17. The Good Life
18.Top of the Pops
19. The Royle Family
20. Blue Peter
It is noticeable that over half are comedies of some sort.
Also on a personal note, it still mystifies me that "Only Fools..." is so popular. I have never gotten along with it. Just me I guess.