I'm English and also a fan of Italian fashion. My favourite suit is a RTW Versace. But it was never a work suit - I bought it for parties. My thought process was not 'what will be best for client meetings?' but 'what will chicks dig?' But I could have got a similar suit from an English tailor if I'd asked for it. They'll make whatever you want. Usually they have customers with little imagination who ask for something safe. There are so many men to whom fashion is a terrifying minefield - they want something 'correct' and they don't want to look stupid so they go to a long-established tailor so they can pay an expert to take all the big decisions. That's not the fault of the tailor. He has to make a living so he accommodates the foreigners who fly in and want to look like Sean Connery in Dr. No. There are English tailors who try to exploit a more up to date niche, like Ozwald Boateng. His output is at least as Milanese as anything in Milan, IYSWIM. But there's nothing to stop you going to Anderson and Sheppard with a photo of an Ozwald Boateng suit ripped from GQ and asking for something similar. I expect the tailor would enjoy it.
I actually think you would be mocked by the tailors the second you walked out of the shop.