Mould in my attic?

[DiscoStu]

Hi. I have some white mould in my attic which is concerning me. There's a pile of white 'fluff' where the plumbing pipe box enters the attic from the bathroom, and there's also patches of white all over the underside lining of the roof itself. Can anyone tell me what it could be and how I can treat it? Thank you http://i9.photobucket.com/albums/a79/boldboy/I MG_0862.jpg http://i9.photobucket.com/albums/a79/boldboy/I MG_0859.jpg
http://i9.photobucket.com/albums/a79/boldboy/I MG_0860.jpg

I've also had some mould on a leather jacket which was hanging in a fitted wardrobe against an exterior wall.

[buildersmate]

Mould is formed when there is a build up of damp static air. That is why it is worse in the back of your wardrobe - it is colder and the air doesn't move. The moist air comes from your house - water vapour in the air from cooking, airing clothes, showering - it doesn't all get extracted - it then rises up through the plasterboard and into the loft space where it condenses as water (because it is colder once it has passed through your insulation layers on the ceilings.
Do you have vents (in the form of flymesh) at the edges of the eaves? - these are designed to allow air into the cold roof space and ventilate it. Are they blocked with insulation? In extreme case it is sometimes necessary to fit a vent at the line of the apex of the roof - to let the moist air out.

[sp1214]

Your photos look ghastly. Looks like damp rot. As Discostu says it would help to have better air circulation. If you live in a semi or a detached rather than putting vents in the eaves a better solution is to put a 9" airbrick into the end gable wall/s.
To help dry your attic either buy or hire a dehumidifier which consumes damp by the bucketful.