Absolutely not. You will, however, be expected to accept, hold or reject any offer within 48 hours of receiving it. If you reject an offer, you will not be eligible for any further offers for that application.

Please note that if you reject an offer in a particular round this will have no implication on your application to any future rounds of recruitment.

If you reapply , whether you reject an offer, or accept it and then withdraw from it at a later stage, this would not be classed 'relinquishing' as unless you had actually begun physically working in the programme.