Most stairs descended by a slinky

Most stairs descended by a slinky
Who
Marty Jopson, Hugh Hunt
What
30 total number
Where
United Kingdom (Cambridge,Grafton Centre, Cambridge)
When

The most stairs descended by a slinky is 30 and was achieved by Marty Jopson and Hugh Hunt (both UK) on The One Show in Cambridge, UK, on 18 February 2014.