The police watchdog has confirmed they have received complaints from families of Hillsborough victims of police surveillance
Free tickets for a memorial service to commemorate the Hillsborough disaster have been reportedly sold for £100 by touts.
Hillsborough survivors have spoken of how they were "scared and intimidated" by officers from the force investigating the disaster.
Scotland Yard will remain silent over claims that undercover officers spied on Hillsborough campaigners "to protect national security and undercover police tactics", the force has said.
Families of the 96 Hillsborough victims are attending a pre-inquest hearing in London.
They expect to hear an update on the progress of the various investigations taking place.
The Hillsborough families will attend a pre-inquest hearing in London later. Relatives of the 96 will get to raise any issues, ahead of the new inquests - to be held in Warrington.
Hillsborough justice campaigner Anne Williams who died earier this year is to be honoured at Sunday's BBC Sports Personality of the Year ceremony. Anne Williams fought tirelessly to overturn an inquest verdict of accidental death against her 15-year-old son Kevin.
He was one of 96 Liverpool fans who died in April 1989 at the FA Cup semi-final against Nottingham Forest.
The BBC award is given for outstanding achievement in the face of adversity.