Paint looking bit sad

[xmyboys]

We did new plaster and painting about 5-6 years ago.
Gloss edges starting to yellow.
Paint looking bit marked and sad.
Does it just need a good clean or is it a whole repainting job?

Cleaning won't make any difference to the gloss sadly if it's gone yellow. It needs repainting with a water based gloss (or an eggshell for a less shiny look) which won't yellow.

You might get away with a clean for the walls though, depends how bad they are and if it's grubbiness or chips/dents. Have you tried rubbing off the worst marks with an eraser?