Walking from Hackney to St Panc with a monster

An idea that could be researched whether its allowed on board is to go up to Hackney central overground and take the train to Caledonian rd then cycle it down to Kings Cross.....

Think it won't fit on an overground train ... and it will be a bit of a beast to lug up and down the stairs at Hackney Centrale and Highbury & Is.

And, would get jammed in the ticket barriers [but that's where the cattle plow would come in]