I have come across RTC a couple of times at Upfest in Bristol and really like his stencil work. This piece featuring Stephen Hawking reinforces my admiration. Many regular readers will know that I consider multi-layered stencils to be a highly skilled art form, and one that is probably misunderstood in terms of the hard work that goes into a piece like this one.
I believe RTC is a local Cheltenham artist, so it must be especially pleasing for him to be able to do a piece at the festival. I am guessing that RTC is referencing one of several books by Stephen Hawking in this piece, and most likely ‘a Brief History of Time. This is a truly excellent stencil piece.