The central garden , which was originally reserved for the use of the occupants of the houses as was standard in a London square , is now a public park managed by The Royal Parks . At the eastern end of the garden there is a small memorial dedicated to the British victims of the September 11 attacks . The memorial includes an elliptical granite block engraved with the names of the victims and the poem '' For Katrina 's Sun-Dial '' , by Henry van Dyke
September 11 attacks
September 11 attacks
Grosvenor Square