▁service ▁was ▁originally ▁built ▁by ▁Tele text ▁Ltd . ▁in ▁collaboration ▁with ▁In View ▁Technology . ▁In ▁a ▁deal ▁between ▁BBC ▁World wide ▁and ▁In View ▁Technology , ▁Tele text ▁Ext ra ▁was ▁rela unch ed ▁as ▁Radio ▁Times ▁Ext ra ▁on ▁ 3 1 ▁January ▁ 2 0 1 1 , ▁with ▁editor ial ▁content ▁from ▁the ▁Radio ▁Times . ▁ ▁Us age ▁Radio ▁Times ▁Ext ra ▁provides ▁users ▁with ▁an ▁Electron ic ▁Program me ▁Guide ▁( EP G ) ▁carrying ▁ 1 4 ▁days ▁of ▁TV ▁list ings ▁including ▁programme ▁information . ▁You ▁can ▁access ▁the ▁EP G ▁from ▁any ▁Free view ▁TV ▁channel ▁by ▁going ▁to ▁your ▁digital ▁remote ▁control ▁and ▁pressing ▁the ▁‘ TV ▁Guide ’ ▁button , ▁when ▁using ▁a ▁Radio ▁Times ▁Ext ra - compatible ▁Free view ▁receiver . ▁A ▁small ▁window ▁on ▁the ▁EP G ▁continues ▁to ▁display ▁video ▁from ▁the ▁channel ▁you ▁were ▁on . ▁▁▁▁ ▁If ▁you ▁press ▁the ▁‘ Text ’ ▁button ▁on ▁your ▁digital ▁remote ▁while ▁view ing ▁the ▁EP G , ▁you ▁are ▁taken ▁to ▁a ▁digital ▁tele text ▁service , ▁with ▁information ▁such ▁as ▁News , ▁Sport , ▁Racing , ▁Tra vel , ▁We ather , ▁Entertainment ▁and ▁Hol id ays . ▁Tele text ▁Ext ra ▁had ▁more ▁content ▁than ▁Tele text ▁Ltd ' s ▁digital ▁services ▁on ▁I TV ▁and ▁Channel ▁ 4 ▁and ▁carried ▁high - res ▁images ▁with ▁top ▁stories . ▁ ▁Crit ic ism ▁The ▁software ▁has ▁been ▁installed ▁on ▁some ▁set - top ▁boxes ,