As an Industry Training Board (ITB), the CITB is given powers to collect annual levy payments, with the money used to provide training grants and other services that support the UK construction industry.
If you are a construction business/employer based in Great Britain you should be registered with CITB.
Registering gives you access to funding and support services for skills and training.
Once your business is registered you will be required to complete an annual Levy Return, which will enable you to claim grants. Both Levy and Grant activities are easier and faster if carried out online.
You do not have to be an actual Levy payer to claim training grant support.
http://www.citb.co.uk/levy-grant/claiming-grants-available/