Gordon Ramsay revealed on Thursday that his signature burger can now be delivered to the door of London residents!MORE: Gordon Ramsay reveals he is the 'proudest father' as son Jack joins the Royal MarinesSharing the news on Instagram, the famous chef posted a video of a food delivery being zipped through the capital, announcing that his restaurants' signature dishes can now be ordered online. WATCH: Oscar Ramsay takes after dad in new meal video - and it's hilarious!"London....