I think you should not put IT specialists from India and Poland in the one bag. Polish engineers are sometimes a bit late when it comes to the new technologies, but are very good compared to ones from, for example, Ireland.
It doesn't matter. They are no smarter than BA's original British engineers, but with decades less experience on those systems. Even if they were smarter - and in general the talent prefers to work for real companies, not bodyshops, so that's unlikely - they can't compensate for the lack of real experience.
Only a person who believes experience doesn't matter would sign an outsourcing deal.
You think the core systems of major airlines or any other large org turnover every 2-3 years? You think knowing the syntax of a particular language is comparable to decades of domain knowledge? You think that ANY 20-something, anywhere in the world, has decades of experience of anything??
No, YOU know nothing about what you write.
Wow you really believe Poland is some third world country where we ride horses to our farms? They have experience, in some ways Poland is way ahead of UK in digitalization of many services. In great part because of thriving economy, great schools and excellent developers.
Poland has some of the best programmers according to a study conducted by hackerrank https://blog.hackerrank.com/which-country-would-win-in-the-p...
No, I was in Poland just last week in fact.
But my point stands: BA's own staff have been operating its systems for decades. No matter how good you are solving made-up puzzles on Hackerrank, you can't match that experience of those systems overnight. There would have been people at BA who'd been working on say the reservation system for 30+ years - and you're claiming your "hacker rank" can beat that. And THAT is why outsourcing always fails, that kind of belief.
Apologies if that seems a bit harsh, but the assertion that "we do well on Hackerrank therefore we are as qualified to maintain legacy systems as their original authors" just doesn't make sense.