Lisa Galliers - Principal researcher & writer at Which?

Lisa Galliers

Principal researcher & writer

A veteran consumer advocate with over two decades of rigorous product-testing experience, Lisa has led our mattress category since 2020 and joined our home energy team in 2024. Her mission is to bring transparency to the mattress deals market while delivering clear, actionable advice on home energy solutions.

74 articles

2026
1. 19 Jun
  Save money with these summer boiler jobs
  Heating & energy
2. 02 Jun
  Top tips to reduce your heating bills
  Boilers
3. 01 Jun
  How to dispose of a mattress
  Mattresses
4. 01 Jun
  Best mattresses for back pain
  Mattresses
5. 01 Jun
  Best mattresses for side sleepers
  Mattresses
6. 01 Jun
  Best mattresses for 2026
  Mattresses
7. 01 Jun
  Which mattress brand to buy in 2026
  Mattresses
8. 01 Jun
  How to clean a mattress in 6 easy steps
  Mattresses
9. 01 Jun
  Best mattress deals 2026
  Mattresses
10. 21 May
  Which? Don't Buy mattresses
  Mattresses
11. 21 May
  Best hybrid mattresses
  Mattresses
12. 08 May
  Best pocket sprung mattresses for 2026
  Mattresses
13. 08 May
  UK bed sizes: bed and mattress size guide
  Mattresses
14. 17 Apr
  How we test mattresses
  Mattresses
15. 01 Apr
  ATAG boilers review
  Boilers
16. 30 Mar
  5 things you should know about mattress guarantees before hitting the shops
  Bedroom
17. 16 Feb
  How to return a mattress
  Mattresses
18. 11 Feb
  The mattress shopping tip that could save your relationship
  Bedroom
19. 04 Feb
  Emma vs Simba vs Eve mattresses: which should you buy?
  Mattresses
20. 13 Jan
  5 things I'd never do as a mattress expert
  Bedroom