Knak, the USAAF did fly Spitfires over Berlin [ albeit PRU types] ,
& it sure is a matter of speculation - as to if they'd use them in the fighter role -
instead of `38s & `47s,- if Merlin Mustangs weren't available.
I doubt it though, & the `51 really did just hold all the best cards for escorting 8th AF heavy bombers, & wasting the Jagdwaffe by attrition.
I know that in the MTO, Allison powered Mustangs flew escort for medium bombers,
but lacked the alt' performance of the turbo boosted birds.
Brooke, about hi-alt performance of Griffon Spitfire vs P-47, here's a scenario
I wonder if even the `47N could tote enough gas/run its R-2800 long enough at high power,
- to fly an intercept vector on a high/fast flying PRU Spit XIX?
Post war trials showed that the new-fangled RAF Meteor jets couldn't do it.
& does anyone know - if the Soviets ever used their Thunderblots to try & intercept RAF PRU
snoopers prowling high over the iron curtain - post VE-day?