Click on the pictures and read the captions which will give the gist of what's happening.

The event happens on 4th February.

The BT Tower consists of 34 floors and 900 steps.

I have to walk up them.

One special challenge is that the ceilings are low, so I can look forward to a sore head as well as aching legs and blisters.

I'm not convinced that walking the dogs in the park is really adaquat preparation for this.

Please donate generously - the proceeds will go to Childline.