Rolling, the cockpit glazing is like a conservatory sitting on top on the fuselage. The Astrodome is the back part and I don't think big enough. It certainly wasn't when I bounced through it but not out of it
.
Yes, I think there was a hatch above the pilot but probably inaccessible unless bailed out after.
IIRC, my mother in law's boyfriend, was who a FE on Halifax didn't get out. I think some of them did.