Re: Battle of Britian - some of the forgotten bits.
Weight alone didn't disqualify a twin-engine plane from being an effective fighter. Consider the P-38 Lightning, which weighed > 30% more than the Bf 110.... yet did a very creditable job of air-to-air combat, ground attack, and even bomber escort (that last until more appropriate/easier to fly at altitude aircraft were available). And P-38s killed Yamamoto.