I think you can superimpose the face of a horse You'll still have the words "bell end" Has there ever been a race horse with the name "Bell End?" There could be a get out.
I think you're getting confused. I'm sure George's tattoo is of Sir Ian McKellen, with his hand on Michael Barrymore's shoulder.
It would appear to be quite easy to convert into an image of John Lennon circa 1970, so best just hope he's a Beatles fan.
http://www.the-racehorse.com/stats/horse/bell+end/413027/?xl=Rx&p=1 Yes, and it's not very good..........perfect!