Placing of entry flap is nothing unknown, only question is why on the starboard side? It is established in WW1 that entry in aircraft should be done from left side and main reason is that many of the officers are previously cavalry officers and they have mount on horse from left side. Until today is remained that entry in aircraft is from port or left side.
Escaping from the damaged plane in higher speed is another question. I have watch RAF archive movie during the wind tunnel test of the attempt of pilot to get out from airplane and it show that it is impossible at speed of the 400 MPH and over. Pressure of air simply did not allow to open cockpit and even if it is allow it press down pilot into seat. Solutions was in general jettison of the cockpit but there is no solution of the pressure on pilot. Real solution come from the installing of the ejection seat.
So... start writing book about the Hurricane
Cheers