Yes, an accurate protrayal... I think it would be fair to say that Colossus must surely be one of the greatest inventions/developments to come out of the war?
It was certainly one of the greatest innovations from which we have benefited today. I just think the Brits lost a great opportunity when they let the Americans take the lead in computing. And by driving Turing to suicide over something like homosexuality. It was the C20th inquisition