** Oilfield services provider Petrofac's PFC.L shares down
25% at 25.52p in early trade; top pct loser across all London
stocks
** Company still facing challenges in securing performance
guarantees for new contracts
** Company remains in talks with lenders to restructure its
debt in exchange for equity
** Petrofac continues negotiations with prospective
purchasers regarding sale of non-core assets
** Shares down ~11% YTD, as of last close
(Reporting by Anchal Rana in Bengaluru)
((Anchal.Rana@thomsonreuters.com; +91 9915609050))