The charity stunt is part of the 'Make Your Face Funny for Money' campaign being run this year by Comic Relief, ahead of its annual televised event on Friday 13 March.
Both Lebedev and John are well known philanthropists to the arts and beyond in the UK.Lebedev emerged as a self-styled "beard guru" back in the summer of 2013, when Newsnight presenter Jeremy Paxman dabbled with a hirsute appearance.
At the time, Lebedev explained: "For my own part, and despite my earlier warnings, it was never my intention to grow one.
"I began merely with stubble, when I was around 25, but have ended where we are today. My grooming regime is very simple — an electric trimmer and occasionally a small brush. I can easily go for a week to 10 days without lavishing any attention up on my growth.
"If I am travelling, as recently in Ethiopia, I will just let it go, completely, like Leo Tolstoy, a style I've occasionally toyed with keeping.
"On these occasions, when alone or with close friends, I have been known to curl the ends of my moustache into rings."
For details about how to take part in this year's Red Nose Day visit ..jpg)
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