(Please, no posts about vowel sounds and rhotic accents and the rest of it which has been hashed over so many times).
I was listening to a podcast from a company called Tortoise Media. The host - who is from London - says "tor-tuss". I am Scottish and would never in a million years say it that way, it's tor-toys to rhyme with turquoise. Is this a regional thing? And if other people are saying "tor-tuss" why is the colour not tur-qwuss?