Met Police assistant commissioner Mark Rowley said:
Just to be clear, we are focused on the appeal on Crimewatch next week which we hope will produce new witnesses. It is clearly too early to speculate about where this will lead.
It remains vital for us, and the success of the appeal, that the public are focused on new facts that can be released by the investigative team rather than speculation.
I am impressed by what Detective Chief Inspector Redwood and his team have achieved but a conclusion is not imminent, there is much ground to cover and we still need assistance - hence the appeal next week.
More top news
Ratings agency Moody's said victory for Brexit would "herald a prolonged period of uncertainty" for the UK.
Five people were taken to hospital after walking on coals at a Tony Robbins seminar called 'Unleash the Power Within'.
An emergency meeting will be held today to discuss the Scottish government's next steps following the UK's decision to leave the EU.