Likelyhood of lead paint in 1970s build UK
Get a rub-stick lead test kit, they're very easy &amp; cheap. My understanding is that you didn't ban lead paint until 1990 in the stores. Bright yellow is a clear indicator it's lead, that started out navy blue. I'm kidding of course.

But, lead paint's only bad if you swallow it so don't lick or eat any, though it's the color of cake frosting (icing, cream, schmootz) &amp; wash your hands liberally with lots of soap &amp; water, for once in your life, after actually handling it &amp; anything that might have stuck to it for 40+ years. Looking at it doesn't require decontamination.

Secondly, just don't scrape it nor sand it. Yep, no scraping &amp; no Sandpaper or Pricker Cloth or Dragon's Skin or Stubble Pads, whatever you might call it over there. It's fine to peel, pick &amp; lift off with a putty knife (yeah, whatever). Paint Stripper (no that's not a "dancer") is also fine. But, most people pass it on to the next person &amp; paint over it with a Lead Encapsulating Paint. You should go that way since you took the wallpaper down &amp; did your part.