Ghost bike at Brockley Station

BC reader Lep Recorn writes:

I do not know how long it has been there, but there is a very odd Ghost Bike attached to the railings opposite the bench. It is a small child's (~ 2 or 3 years) with stabilisers, a picture in a frame which seems to be the tallest and smallest people from the Guinness book of records and a new testament attached. 

On the railing are some lego stickers. . . as I said very odd. Here's a photo. If anyone knows the story behind it, I am curious to know more.