Occasional liveaboard in London, St. Katharine's Docks?

[Dockhead]

I live in Europe far from the sea, and hope to buy a yacht in the next month or so. Since I am frequently in the U.K. on business (once or twice a month), I am thinking about leaving it on the South Coast of England during the summer, where I will be able to get to it easily before or after my meetings in London, and wintering the boat in London at some place like St. Katharine's Docks or Galleon's Point.

Keeping her in London over the winter, I will be able to sleep on her and save the horrendous cost of London hotels (5 to 10 nights a month), which will more than pay for the slip fees, even at the posh St. Katharine's. Or will the marinas frown on such a practice? It's not exactly living aboard, or least not on any permanent basis, just a few nights at a time.

What do you guys think? Will I be able to sleep in peace? Have guests? My prospective purchase has decent-size holding tanks for both heads plus a grey water tank for the kitchen.