The records of your interview ought to be available to the interviewee on request under the Data Protection Act and under the Questionaire Procedure in the Discrimination Acts. Other than that you have no automatic entitlement to feedback, although it is good HR practice to give it.
You may wish to ask for the feedback, and if it is refused, use the Data Protection Act to obtain it. Don't expect to be asked for an interview in the future though
The law is an ass.