Investigators have received what are described as "promising" leads in a historical baby murder inquiry after releasing an e-fit of an unidentified woman seen at a grave.

The computer-generated image was shared publicly in a fresh attempt to bring new momentum to the unsolved case of 'Baby April', whose body was found almost thirty years ago.

The infant was discovered dead at Singleton Lake in Ashford, Kent, on April 3, 1995, sparking an investigation that has remained open for decades.

Central to this latest development is the circulated e-fit, which depicts a mystery woman who had been seen at a grave linked to the inquiry.

According to reports, the decision to generate and publish the image was aimed directly at refreshing public memory and drawing out previously unspoken information about what happened in Kent that spring.

That appeal appears to have made an immediate impact, with authorities now reviewing new information that has been characterised as promising lines of inquiry.

What we do not know yet is the precise nature of these new leads, or what specific role the mystery woman shown in the image may have played.

Details have not been released regarding who provided the fresh information, nor has it been confirmed whether anyone has been formally questioned since the image was made available.

As with any long-standing cold case, refreshing the public's awareness is often the only way to uncover details that were missed or withheld at the time of the original discovery at Singleton Lake.

The priority for investigators now is examining every piece of information that has come forward following the release of the e-fit.

I will be following this one closely as the inquiry develops — check back for updates.