31-year-old Gareth Mills from Shaftesbury admitted December's attack in Ringwood Road in Alderholt.
Mum Releases 'Angels' Photo
The mother of two children murdered by their IRA bomb survivor father who then killed himself has released a photograph of ''her angels'' as an inquest opened into their deaths.
The bodies of Michael, 51, Ben, seven, and Freya Pedersen, six, were found next to a Saab 900SE convertible car in a tiny lane at Newton Stacey, near Andover on Sunday.
The children's mother, Erica Pedersen, released a photograph of herself with the two children along with the statement: ''My angels are in heaven now.''
Grahame Short, coroner for central Hampshire, opened an inquest into the deaths and heard evidence confirming the identities of the three deceased.
The Winchester hearing was also told that post-mortem examinations showed that all three died of stab wounds.
Mr Short adjourned the inquest to be resumed on a provisional date of December 5.
Mr Pedersen was a former army sergeant in the Household Cavalry unit that was hit by an IRA nail bomb in Hyde Park in 1982.
He had recently split from his wife Erica, who lives in Ashford, Middlesex.
Mr Pedersen, who had been living in Chertsey, Surrey, had taken the children to visit his father in Andover but failed to return the two youngsters to their mother by the pre-arranged time of 5pm.
The bodies were found lying behind the car at 6.15pm on Sunday by a walker, according to police.
Officers were tracing the family of Mr Pedersen, who had two other children from a previous relationship, when his estranged wife raised the alarm at 7pm.
The children's maternal grandfather, William Clifford, 67, from Buckinghamshire, said the family was ''extremely distressed'' by the deaths.
Mr Pedersen, who had two children from a previous relationship, wrote on Facebook on August 31 that he had split from his second wife Erica, 43, with whom he ran a haulage business called High Road Logistics.
He said: ''Worst day of my life.
''Sadly have split with Erica am absolutely distraught.''
The 1982 bomb attack hit as Mr Pedersen's unit was taking part in a changing of the guard ceremony.
Four soldiers and seven horses were killed in the explosion, which left Pedersen's horse Sefton seriously injured.
Despite 34 separate wounds that required eight hours of surgery, the animal survived and became famous for battling against the odds.
Sefton became a symbol of the struggle against the IRA and won the Horse of the Year, a prize Sgt Pedersen picked up on the animal's behalf.
The 18-year-old woman couldn't remember what happened in Damerham High Street - near Fordingbridge.
The two cases happened in the early hours Cambridge Road and Burnaby Road.
Lewis Hine - who has a brain tumour - posted an inspirational film about his life, on his 16th birthday last week.
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