In reply to jameswoodman1: I have had similar issues in the past.
What it comes down to is, did you ask the agency to put your CV in for either this job, or did you ask them to put your CV in for any job without contacting you first?
If the answer is no to both those questions then get back to the employer to tell them that you did not authorise the agent to represent you for this job and you should be able to go directly to the employer.
The agent is pulling a fast one if both answers are no. Give them a phone and politely tell them to drop it. Point out to them that employers do not like underhanded agents and they could be running the risk of the employer not using them again.