NEW : Trinity Mirror names two of those arrested as editor and deputy editor of The People . NEW : ` A former BBC journalist has been jailed for six months after being found guilty by a jury at Southwark Crown Court in London on Friday of conspiring to hack phones belonging to celebrities including Prince William and Kate Police Mirror Group Newspapers publishes the Daily Mirror , the Sunday Mirror and The People , as well as Scotland 's Daily Record and Sunday Mail . say the investigation is separate from a probe of News of the World . All four people arrested are current or former journalists at Mirror Group Newspapers .
NEW : Trinity Mirror names two of those arrested as editor and deputy editor of The People . NEW : ` A former BBC journalist has been jailed for six months after being found guilty by a jury at Southwark Crown Court in London on Friday of conspiring to hack phones belonging to celebrities including Prince William and Kate Police say the investigation is separate from a probe of News of the World . All four people arrested are current or former journalists at Mirror Group Newspapers .