Shikari is massive over in England but they're more of a Download and Reading/Leeds band than Glastonbury. I doubt the hipsters will enjoy them but they're going to have a massive crowd..guaranteed.
I know they're massive here, I am from England! Reading and Leeds suits them quite well, hence why they always play the main stage. I don't think many will like them at Glastonbury. Festival tickets in the UK are so expensive, I imagine all the Shikari fans would go to reading/ Leeds or download as opposed to this.