We present the results of a proper motion survey of the Hyades to search for brown dwarfs , based on UKIDSS and 2MASS data .
This survey covers \sim 275 deg ^ { 2 } to a depth of K \sim 15 mag , equivalent to a mass of \sim 0.05 M _ { \odot } assuming a cluster age of 625 Myr .
The discovery of 12 L dwarf Hyades members is reported .
These members are also brown dwarfs , with masses between 0.05 < M < 0.075 M _ { \odot } .
A high proportion of these L dwarfs appear to be photometric binaries .