Try using https://skewee.com (home page)
https://skewee.com/runsearch.aspx (search page)
You'll get first 100 links in a listing format.
Much more easy to handle.
'mattress' - 08/25/20 20:47 41
https://www.dreams.co.uk/mattresses
https://www.mattressonline.co.uk/Shop/Mattresses-C136/
https://www.bensonsforbeds.co.uk/mattresses/
https://www.bensonsforbeds.co.uk/mattresses/double/
https://www.bensonsforbeds.co.uk/mattresses/king-size/
https://www.bensonsforbeds.co.uk/mattresses/single/
https://www.bensonsforbeds.co.uk/mattresses/medium/
https://www.happybeds.co.uk/mattresses
https://www.argos.co.uk/browse/home-and-furniture/bedroom-furniture/mattresses/c:29870/
https://www.argos.co.uk/browse/home-and-furniture/bedroom-furniture/mattresses/c:29870/opt/page:2/
https://www.argos.co.uk/product/8115564
https://www.argos.co.uk/browse/home-and-furniture/bedroom-furniture/mattresses/c:29870/type:memory-foam/
https://www.wayfair.co.uk/mattresses/cat/mattresses-c224738.html
https://www.silentnight.co.uk/mattresses/
https://www.dormeo.co.uk/mattresses.html
https://www.ikea.com/gb/en/cat/mattresses-bm002/
https://www.dunelm.com/category/home-and-furniture/furniture/bedroom-furniture/beds-bedsteads-and-mattresses/mattresses
https://casper.com/uk/en/mattresses/
https://www.mrmattress.co.uk/mattresses
https://www.independent.co.uk/extras/indybest/house-garden/mattresses/best-mattress-a6950396.html
https://uk.tempur.com/mattresses/
https://beds.co.uk/products/mattresses/
https://www.furniturevillage.co.uk/bedroom/mattresses/
https://www.getlaidbeds.co.uk/Mattresses
https://www.johnlewis.com/browse/furniture-lights/bedroom/mattresses/view-all-mattresses/_/N-cao
https://www.evesleep.co.uk/mattresses
https://www.very.co.uk/home-garden/mattresses/e/b/12991.end
https://furniture123.co.uk/bedroom/mattresses
https://www.habitat.co.uk/furniture/bedroom/mattresses
https://www.time4sleep.co.uk/mattresses
https://www.bedworld.net/mattresses/
https://en.wikipedia.org/wiki/Mattress
https://www.amazon.co.uk/bed-mattresses/b?ie=UTF8&node=2850828031
https://www.next.co.uk/shop/department-homeware-productaffiliation-bedsandmattresses/category-mattresses
https://www.wired.co.uk/article/best-mattress
https://jysk.co.uk/bedroom/mattresses
https://www.goodhousekeeping.com/home-products/g29892090/best-mattresses/
https://www.dialamattress.co.uk/mattresses
https://simbasleep.com/products/mattress
https://www.nectarsleep.co.uk/products/memory-foam-mattress-gifts
etc...