all black spider identification please

[catkinq]

My husband has found a black and shiny spider in our attic in Somerset. It does not have any hairs on its legs and the legs are thinner at the ends. It has a very round body and may have very faint cream stripy marks on its underside. On top it is simply black and shiny. Any suggestions as to what it is? We can't find it in any books but thought that it may be a false widow.
TIA,
Hayley

[catkinq]

Meant to add that the body is about 8 mm long and the legs about a cm each. It really is very shiny - we have some photos but I can't seem to upload them.
Hayely

[charlieb]

This is the link you need to upload photos: Wild About Britain Images Upload

and select "image library"