When bending the high e to a full tone bend the B string always slips under my fingers and messes up the bend as it just adds to the work of making the bend any help?
well like all techniques practice makes perfect, are you bending with only one finger? if you are try using two or even three fingers behind it to support the bend, its easier and will give you better control.....
Yea you're probably focusing all of the bending force on one finger [probably your pointer finger]. Let your middle and ring fingers support your pointer finger. Also, make sure that you're pressing hard enough on the fret [but ofcourse not too hard, you know?]
Hope that helps. Keep practising.

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Arch your fingers so that the b-string'll just slip up your fingernail.
Agile Ash RB 828
Schecter C-7 (old 90s style headstock)
Handbuilt 6-string V
Handbuilt Baritone scale 6 string Iceman-copy
Pod HD300