BUZZ-Circle: pulls out of contract
** Circle dives nearly 25 pct, 2nd biggest one-day pct drop since floating on AIM mid 2011 as the UK's 1st private NHS hospital provider withdraws against backdrop of cuts
** Share (LSE: SHRE.L - news) price drop wipes $53.5 mln off co's market value
** Co walks away from Hinchingbrooke hospital in eastern England because cannot afford extra funding needed to cope with jump in A&E admissions
** Numis Securities places TP & rating under review
** Broker says in light of evident clinical & financial improvement at Hinchingbrooke under Circle's management, it does not expect decision to affect co's other NHS work, & believes it can still win new NHS business (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)