sentences:  The 253 series trains were gradually replaced on "Narita Express" services from October 2009 by new E259 series EMUs, with the last trains operating until 30 June 2010.Most trains were subsequently withdrawn and scrapped, but two six-car sets, Ne201 and Ne202, were converted in late 2010 to become 253-1000 series (see below), and two three-car sets, Ne107 and Ne108, were sold to the Nagano Electric Railway (see below).The two newest-built sets, Ne201 and Ne202, underwent extensive refurbishment at JR East's Omiya Works and Tokyu Car Corporation's Yokohama factory to become 253-1000 series sets OM-N1 and OM-N2 for use on "Nikkō" and "Kinugawa" limited express services jointly operated with Tobu Railway from 4 June 2011, replacing the 485 series and 189 series EMUs currently used.