However, they are worn down and need to be replaced. They look like this: <http://www.apple-juice.co.uk/images/DSCF1406.JPG
and I think:
<http://www.cometspares.co.uk/product.aspx?c 85&ma7&mt=0&mo87841& id0265&> will be the replacements I need.
Does that seem right?
What are "C.E.SET" brushes, by the way?