What Alison Anderson remembers most about Srebrenica is the clothing.

"When we received the bodies from the graves everything was all one colour. You couldn't distinguish anything," she recalls.

But once it was washed that all changed. "You were finding football strips - maybe a football strip your kids were wearing - and familiar logos. It became much more real because you could relate to the clothing."

For three years in a row at the end of the 1990s the then forensic technician travelled to Visoko in Bosnia for the International Criminal Tribunal for the Former Yugoslavia as part of the forensic teams. There she would take part in examining remains excavated from mass graves in an attempt to prove crimes against humanity.

On July 11, 1995, more than 7000 Muslim men and boys were killed by Bosnian Serbs in Srebrenica, the worst atrocity in Europe since the Second World War, despite the presence of Dutch UN peacekeepers.

Mrs Anderson, 49, is currently NHS Lothian Mortuary Services Manager at the Royal Infirmary in Edinburgh. Back then however she was giving up her holidays to help out in Bosnia."The work was incredibly unpleasant and quite harrowing. It became very obvious very quickly that these weren't soldiers in a war situation. These were civilians and young boys."

Now 20 years after the genocide her part in the forensics work has been memorialised in a painting by her former colleague Robert McNeil which is on show at Iota in Hyndland Street, Glasgow. "I'm very proud to feature in it," Anderson says. "And the story behind the painting is that the world hung Srebenica out to dry."

Now at least the memory of those who were killed is being celebrated. Today Mrs Anderson will attend a memorial service at St Giles Cathedral and tomorrow she will be at the Iota gallery on the 20th anniversary of the Srebrenica massacre.

Earlier this year she even returned to Bosnia and met the Mothers of Srebrenica. "What impressed me most about them was that they don't appear to hold any hatred towards the perpetrators because they feel to continue the hatred means the troubles there would never end. I was so very, very humbled by their attitude."