A service has been launched which could put an end to family disputes surrounding paternity.

Sunderland-based company Complement Genomics is offering clients the chance to keep their DNA on file with their wills, heading off disagreements surrounding paternity.

Dr Neil Sullivan, the company's chief executive, said: "The new Willcheck service is a great step forward in family relationship analysis and should reduce the need for clandestine activities of sample collection after death, when emotions are obviously heightened."

A high profile example surrounded Formula One racing driver Ayrton Senna, who had no children and left an estate worth £110m when he died in May 1994.

Former model Marcella Praddo claimed the Brazilian was the father of her daughter, Victoria.

Senna's relatives were forced to give DNA samples to settle the claim.

The tests proved to be negative.

In addition to Willcheck, the company has launched a sister service, Genecheck, where clients can store DNA for later testing of genetic disorders.

The company, which was set up two years ago, says no-one else will have access to genetic information and clients choose to whom they will disclose their DNA details.