Britain's Poundworld goes into administration, putting 5,100 jobs at risk

* Deloitte appointed administrator of 335 store chain

* More than 5,000 jobs at risk

* Poundworld demise follows Toys r Us UK, Maplin and Conviviality (LSE: 131376.L - news) (Adds detail)

LONDON, June 11 (Reuters) - British discount retailer Poundworld has gone into administration, putting 5,100 jobs at risk and becoming the latest victim of brutal trading conditions in the UK retail sector.

Business services firm Deloitte said on Monday it had been appointed as Poundworld's administrator.

Private equity (IOB: 0QLS.IL - news) group TPG Capital, Poundworld's majority owner, put the discount retailer up for sale last month but has failed to find a buyer.

Deloitte said Poundworld, which operates 335 stores across Britain, would continue to trade while a buyer for all or part of the business is sought and there would be no immediate redundancies or store closures.

Poundworld, based near Wakefield, northern England, is the latest British retailer to be hit by rising costs, cash-strapped consumers and a shift to online shopping. It follows the collapse this year of Toys R Us UK, electricals group Maplin and drinks wholesaler Conviviality (LSE: CVR.L - news) .

"The retail trading environment in the UK remains extremely challenging and Poundworld has been seeking to address this through a restructure of its business," said joint administrator for Poundworld Clare Boardman.

"Unfortunately, this has not been possible. We still believe a buyer can be found for the business or at least part of it," she said.

Some other British retailers are closing stores including Marks & Spencer (Frankfurt: 534418 - news) , fashion retailer New Look, floor coverings group Carpetright (Other OTC: CGHXF - news) , mother and baby goods retailer Mothercare (Other OTC: MHCRF - news) and department store House of Fraser. (Reporting by James Davey; editing by Michael Holden and Susan Fenton)