Just a note for people aiming to get to the park by Tube...
I'm getting conflicting information... a pdf tube map I downloaded from Transport for London suggests Regent's Park station will be closed from June. But a more recent BBC report states it'll be closed from July.
The journeyplanner.tfl.gov.uk site is giving out routes to Regent's Park for the 24th of June, but if I crank it up to the 31st, it doesn't return any routes. So, it really looks as if Regent's Park will be open for next weekend (woohoo!).
I'll be giving tfl a call before I leave, just in case