Who is the Wembley Point Woman?

On 29th October 2004, a woman got in the lift at the Wembley Point building in London and took it all the way up to the 21st floor. Once there, she calmly opened a window and jumped out, her body soon being found in the river down below. Almsot 2 decades on and she has still not been identified, despite a number of interesting clues being left behind.