 The weight of guns and armour protection had a marginal effect on the aircraft's performance.The IID was used in anti-tank operations in limited numbers during the North African campaign where, provided enemy flak and fighters were absent, they proved accurate and highly effective against armoured vehicles and all motor transport.Another wing modification was introduced in the Mk IIE, but the changes soon became extensive enough that it was renamed the Mk IV after the first 250 had been delivered.