No they don't seem to be compatible according to this link (http://www.chainreactioncycles.com/shimano-disc-hub-rear-m475/rp-prod38215)
"Featured Q&A
*Q: Compatible for 11 speed?
by Stryder26
A: Yes, the Shimano MTB 11sp Cassettes run on the same freehub as the previous 8/9/10sp cassettes; only their Road cassettes require a wider freehub.
by CRCHops, Chain Reaction Cycles Staff"*
@JoeGreenwood started
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No they don't seem to be compatible according to this link (http://www.chainreactioncycles.com/shimano-disc-hub-rear-m475/rp-prod38215)
"Featured Q&A
*Q: Compatible for 11 speed?
A: Yes, the Shimano MTB 11sp Cassettes run on the same freehub as the previous 8/9/10sp cassettes; only their Road cassettes require a wider freehub.