A reward of £20,000 has been issued to find the killer who stabbed a woman to death 10 years ago and set her clothing alight.

Detectives investigating the murder of a Wisbech pensioner 10 years ago has appealed on BBC Crimewatch for help to catch her killer, with a £20,000 Crimestoppers reward for information.

The body of 86-year-old Una Crown was found in her bungalow in Magazine Lane on Sunday, January 13, 2013, by a neighbour.

She had been seen alive two days previously and had spoken to a friend over the phone at about 5pm on the day before her body was discovered.

Eastern Daily Press: The body of 86-year-old Una Crown was found in her bungalow in Magazine Lane on Sunday, January 13, 2013The body of 86-year-old Una Crown was found in her bungalow in Magazine Lane on Sunday, January 13, 2013 (Image: Cambridgeshire Constabulary)

The death was initially treated as unexplained but, after a post-mortem examination concluded Mrs Crown died from stab wounds to her neck and chest, a murder investigation was launched.

Mrs Crown's clothing had also been set alight, in an apparent attempt to disguise her injuries and destroy evidence, but the fire did not spread to the rest of the house.

Det Chief Insp Iain Moor, from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, said: “Ten years on from this tragic case, Mrs Crown’s murderer has not been caught and we have not been able to get justice for her family.

“We continue to seek opportunities for new lines of enquiry and this TV appearance, and subsequent reward of up to £20,000, will give us another chance to re-appeal to the public and keep the case in people’s minds.

Eastern Daily Press: The body of 86-year-old Una Crown was found in her bungalow in Magazine Lane on Sunday, January 13, 2013The body of 86-year-old Una Crown was found in her bungalow in Magazine Lane on Sunday, January 13, 2013 (Image: Cambridgeshire Constabulary)

“We still believe the answer to solving this case lies within the local community. I am urging anyone who has information but not yet come forward, to do the right thing and get in touch – someone out there knows what happened to Mrs Crown.

“Any information, no matter how small or insignificant it may seem, may be key to solving this investigation.”

Annabelle Goodenough, Crimestoppers’ South East regional manager, said: “We cannot trace your call or track your IP address and we never ask for or record any personal information. No one will ever know you contacted us.”

The £20,000 reward can only be claimed by those who provide information to Crimestoppers directly on 0800 555 111 or via their online form which leads to the arrest and conviction of those responsible.

Anyone involved in the murder will not be eligible to claim any of the reward.

Information can also be reported to police, quoting Operation Valyrian, via the Major Incident Public Portal.