43:00 - Green leader is no longer engaged after the first dogfight round, so he would not go lost contact in this situation (but again, there should have been a second rotte in him and the first rotte that followed green 2 should have been reduced away).
33:10 - Nothing in the rules ever tells you to combine Luftwaffe markers. In this situation, you are now tailed by two separate rotte, and you will draw a separate dogfight card for each. See the BGG post titled "Reinforcements - combined?".
It's also mentioned in the rule book on p.11 under "Engaged to multiple Luftwaffe Fighter markers": [...] two markers engaged with a Section or RAF Fighter in the same attitude. In that case, draw a separate Dogfight Card for each Luftwaffe Fighter marker. It's also on p.13 "Tailed by two Luftwaffe Fighter markers?".
35:20 - If you do a slip here and it is successful, two of your fighters would disengage and avoid going lost contact. Probably worth trying, especially if you had a veteran section leader. (Although, you should actually have two rotte on your tail.)
Yeah I think Stu brought this one up in an earlier Part. Regarding using Slip anyway. "(Although, you should actually have two rotte on your tail.)" As above I try to fix this later. Cheers.