Throwaway names?

[Pleiades]

I have a question concerning throwaway names for towns.

I plan on making an edit to my first character, Shooting Star, and making him Equestria's version of British. I know we have Trottingham, since Pipsqueak had a Cockney accent when he first appeared (and appears to have British mannerisms). The only problem is, I want to avoid Trottingham at all costs. Nottingham (which I'm guessing Trottingham is named after) isn't the only city in England.

So a friend helped me come up with the throwaway name of 'Coltdon', which is basically London ponified. Most of my Mane RPs will be restricted to Fillydelphia, so I don't have any plans for Coltdon to become an actual location, the same way Fillydelphia itself was thrown around in the show (when parasprites were attacking and where Cranky Doodle Donkey comes from). Is this alright, or do I have to make do with Trottingham?