thanks for the reply guys.
So if you have OEI, the fire push button pressed, and airframe ice accretion, then you should refer to 2.32 for the Vapp increment. This is due to it not being advisable to use bleed air to de-ice the wings.
therefore:
i should refer to QRH 2.32 section 'BLEED' (wing anti ice not avail if there is ice accretion) with speed increments for flap 3-16kt, flap full-10kt etc........??
many thanks!