Russian technology has proven to be as reliable as Lebanese whisky. These "cutting edge" 'aircraft' have most likely been built from parts cannibalized from an older fleet. Besides, Russia is a nation of gypsies and horse thieves, so any aircraft they've produced - with a few exceptions - will most likely fall from the sky after their wooden airframes have been undermined by woodworm.
I'm sure we will be able to beat the pants off English airforce.