GTA VI: London? Could be cool

Four was in Liberty City. Five was in Los Santos. Six could be anywhere, and I vote for London.
London hasnt been mentioned in years in GTA, only one game in the series and it was the old 2D series, and with a long history of mobsters and underworld crime, it would be a shame not to play with it, especially in a parody sense.

But given the chemistry of GTAV with the very cool SWITCH system I don't see why they couldn't bring it back with some new characters. But who would fit the profile for the cast? I have a few ideas of who they could base them on.

Ace (Dr Who)
Ace is one of the best companions in the shows history. Pretty much prepared for anything, she was game to do just about anything. Especially if it involved explosives. As one of the first female lead characters of the series (GTAO characters don't count) the potential could start a new era for the HD series.

Rick or Vyvyan (The Young Ones)
Anarchists at heart, and in life, these guys cause chaos wherever they go. Why not take a more offensive and proactive role by giving them guns and a target to run down?

Bacon or Big Chris (Lock, Stock, and Two Smoking Barrels)
This seems like an obvious choice, getting any Jason Statham or Vinnie Jones character out as the street wise gangster to level out the extremities of the other characters.

Then there's the Online Component. Sure, you could probably keep using the same toon you levelled up from when you were in Los Santos, have them fly in for one reason or another, but as GTA Online stands, it has the variety that some games lack, but falls short in depth. You get all these different missions, unlocked as you gain ranks, but no motivation to do them aside from different ways to get money, or different ways to be competitive.

So I propose adding some history to your favourite mute. Have him roll up and do his missions with some actual purpose and motivation, not some thinly veiled favour for Trevor or Martin "Mad Mex" Madrazo.

And how about some collectables? I would like a spot in my GTAO garage reserved for a Space Docker, or the various new stock cars that are up for grabs.