If new, yes. It is against the Supply of Machinery Regulations (note there are some exceptions) to supply machinery that does not satisfy the Essential Health and Safety Requirements and hence to be CE marked. If you are importing from outside of the EU, then you are responsible for CE marking. If you are making the machine 'in house' it still needs to be CE marked - the machine is still considered to be 'on the market'

Reg 10 technically outlines the duty of the supplier & others in the supply chain. I caution you not to rely on a bit of sticky paper with a symbol on it to cover you for your real duties as a user under PUWER.

Ron I think we said the same thing!! There are exceptions, as I suggested. Quote from your link 'Is CE marking mandatory, and if so; for what products? Yes, CE marking is mandatory. However, only the products that are covered by the scope of one or more of the New Approach Directives shall be affixed with it in order to be placed on the EU market. Examples of products that fall under New Approach Directives are toys, electrical products, machinery, personal protective equipment and lifts. Products that are not covered by CE marking legislation shall not bear the CE marking.' Don't see the point in adding a post that appears to contradict previous advice.