Mold on walls can be a common problem in the UK due to the damp and humid climate. Here are some steps you can take to remove mold from walls:

  1. Wear protective gear such as gloves, a mask, and goggles to protect yourself from the mold spores.
  2. Identify the source of the moisture and fix it to prevent further mold growth.
  3. Mix one-part bleach with three parts water in a spray bottle or bucket.
  4. Spray or apply the bleach solution onto the affected area. Let it sit for 10-15 minutes.
  5. Scrub the mold with a stiff-bristled brush or sponge until it is removed. Make sure to scrub well into the crevices to remove all the mold.
  6. Rinse the area with clean water and dry it thoroughly.
  7. Dispose of any cleaning materials or rags used to clean the mold in a sealed bag.
  8. To prevent mold growth, ensure the room is well ventilated, and keep humidity levels low.

Note: If the mold has spread over a large area, or if you have health concerns, it is recommended to seek the help of a professional mold remediation company.