Leading barristers including Michael Mansfield QC and Sir Louis Blom-Cooper have already earned an average of more than £400,000 each, according to Northern Ireland Office figures. Senior counsel earn £1,500-1,900 a day. Travel expenses alone have topped £1.3million and a firm of solicitors has been paid upwards of £10million to interview witnesses to the events of January 1972, when 14 demonstrators died after British paratroopers opened fire on a civil rights march through Londonderry.